James Janik
Analyst · Baird
Thank you, Sarah. I'm pleased to say that we ended the year with encouraging results. The ongoing stability in the economy and positive dealer sentiment, plus strong backlog and demand trends, all helped to produce a good quarter and record full year net sales.
Fourth quarter net sales increased 6% to $138 million, producing net income of $34.5 million or $1.50 per diluted share, which includes a onetime benefit from U.S. tax reform. Excluding this benefit, adjusted earnings per share increased from $0.45 per share in the fourth quarter prior year to $0.53 per share this year.
We are pleased with these operating results, especially given the chassis-related headwinds we faced and slow start to winter weather across most of the country. In addition, select North American pickup truck sales increased 4% in 2017 compared to the previous year. We also continued to see improving dealer optimism, and our most recent look at dealer field inventory at the end of January indicated inventories were lower than the same period a year ago, which is positive.
Looking across our core markets through mid-February, we have seen near-average snowfall totals overall. Winter got off to a slow start in many areas, but we saw nearly average snowfall across the country overall in the fourth quarter. So far, in the first quarter of 2018, January saw below-average totals, but we have seen more snowfall in our core markets in early February. Compared to this point last year, we are still ahead for snow totals in our core markets, but it will depend on how the last 30 days unfold as to whether we reach average snowfall totals or fall below. The teams at WESTERN, FISHER and SnowEx have done a terrific job, and we are already looking forward to preseason.
Before going further, let me provide an update on the chassis availability issues that impacted our results in 2017. At Henderson, the availability of chassis from 2 of our OEM partners is slowly improving but will take time to get back to normal. We've seen sequential improvements for several quarters, and we are receiving more chassis today. In addition, we are also monitoring increasing overall demand for Class A trucks across all OEMs, which could impact our supply
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and we'll provide an update during our first quarter earnings call in early May.
The Henderson team continues to work hard to adjust operations in light of these issues. The good news is that demand and order trends remain strong in the medium to long term and our business continues to strengthen. And we will continue to make improvements using DDMS, which I will mention later.
Turning to our Work Truck Solutions segment. The important strategic investments we're making will enable us to take advantage of many of the growth
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and we are receiving pool trucks at all 3 facilities in Pennsylvania and New York. The development of the Kansas City facility is now complete, and we have just begun accepting ship-thru vehicles at that location. As a reminder, this facility will be focused on assisting an important OEM partner with the upfit of medium and large-sized vans, which are produced nearby. We expect revenue from the new ship-thru vehicles to ramp up in the coming years. Our sales teams are now actively quoting new business and the long-term opportunities are exciting.
As we mentioned last quarter, with the multiple natural disasters that occurred in the second half of 2017, our OEM partners worked to help those regions impacted and as such, some Work Truck Solutions group allocations were being diverted away from our truck pool operations to other areas of the country. As we had hoped, those issues do seem to have been temporary and supply has significantly improved in recent months. We remain focused on executing our expansion plans and expect to meet our customers' demands throughout 2018.
With that brief review of our operations complete, I'd like to step back and discuss the DDMS example. It is hard to believe, but it's been just over 3 years that Henderson become part of Douglas Dynamics. Today, Henderson is a very important and integral part of our operations. Given the anniversary, it seems appropriate to look back and share some of the impressive results of our DDMS journey at Henderson, which remains an important focus for everyone involved.
First, I want to highlight 3 points that encapsulate one of our DDMS mantras: The wisdom of many versus the knowledge of one. More than 150 people on the Henderson team have been trained in DDMS problem-solving methods, which is clearly the best way to ensure the process propagates throughout our operations. Remarkably, over 300 process improvements have been initiated, which doesn't include all of the minor adjustments that are being made on a daily basis. We have completed more than 60 week-long Kaizen events spanning all 7 locations and across all departments. With hundreds of people focusing on making improvements, we are starting to see tangible results of our efforts. As a result, we have produced significant improvements in quality, which have resulted in warranty dollars decreasing over 50% in 3 years; we've seen inventory turns that have improved significantly between 2014 and 2017; SG&A as a percentage of sales has decreased 60 basis points during the past 3 years; and finally, and probably most importantly, our lead times measured from receipt of order to delivery have decreased significantly. Today, our lead times are 1/4 of what they were when we acquired Henderson, which our competitors have yet to replicate.
Suffice it to say, we have seen considerable success with DDMS at Henderson over the past few years, and the great news is that we have a lot more work to do. I want to thank everyone at Manchester and our upfit facilities around the country for their ongoing efforts to improve the business. Your hard work is paying off and helping to ensure our future success.
With that said, I'll move on to our cash usage priorities. As previously reported, we paid a quarterly cash dividend of $0.24 per share on the company's common stock on December 29, 2017. Once again, the Board of Directors and management decided it is appropriate to increase the dividend this year, declaring a quarterly cash dividend of $0.265 per share for the fiscal quarter -- first fiscal quarter of 2018. This increase is larger than previous years and equates to a projected full year annual increase of 10% or $0.10 per diluted share. We felt the larger increase was appropriate given our financial performance and the projected favorable impact of our tax rate due to the 2017 tax reform.
Aside from the dividends, we remain committed to using our excess capital to reduce our debt, as Sarah will discuss later. And for M&A, we are continually tracking companies that would be a good strategic fit with our offering, and we will pursue logical deals while maintaining our disciplined approach. For now, we are focused on integrating and pursuing DDMS projects in our Work Truck Solutions segment. While we will continue to explore other opportunities, there are no major deals on the horizon at this time.
Overall, we believe that we are in a strong position with stability in the overall economy, strength in light- and medium-duty truck sales, positive dealer sentiment and inventory all working in our favor today.
With that, I'll turn the call over to Sarah to discuss our financial results in more detail. Sarah?