Thanks, Marita. And good morning, everyone. First quarter operating income of $0.65 per diluted share was a strong result, largely due to favorable results in the property and casualty and annuity segments. P&C after-tax income of $14 million was almost $4 million higher than the prior year quarter. On an underlying basis, the combined ratio improved 3.3 points to 92.1, led by a 5-point improvement in the underlying loss -- auto loss ratio, which was 71.8 for the quarter. The total P&C expense ratio of 27.7 was in line with full year 2013 results and consistent with our earnings guidance. Catastrophe losses were 4.4 points in the quarter, only modestly higher than the prior year.
Within auto, we're seeing the benefit of rate actions taken over the last couple of years. Margins continued to expand as rate increases outpaced loss cost. While the first-quarter winter weather impacted collisions and physical damage coverages, we saw improved liability experience compared to prior year. Our auto BI loss estimates for the first quarter of 2014 are a few points better than our initial 2013 estimates, which ultimately developed favorably over the course of 2013. In addition to providing some benefit to our current accident year loss ratio, the favorable BI loss trends also resulted in overall continued favorable prior year reserve development.
We believe changes we've made in the claim operations are also contributing to some of this improvement. But the same time, we're mindful of the longer-tailed nature of liability lines and the overall industry severity trends in our loss-estimate selections. In regards to property, the underlying loss ratio was comparable to prior year, even including winter weather impacts. In the quarter, both increases in average premium per policy and reductions in catastrophe reinsurance costs provided offsets to the non-cat weather-related losses. We continue to reduce the concentration and number of high-risk property exposures and are in the process of materially reducing and nearly eliminating our Florida homeowners business. We plan to non-renew approximately 5,000 policies over the course of 2014 and early 2015. Our Florida agents are working with various Florida writers to place our customers' property business. This allows us to retain the customer relationships in other Horace Mann products.
In addition, we have modest property nonrenewable programs in various coastal states to further reduce catastrophe exposure. These actions will likely result in some pressure on retention ratios and PIF counts, but they are clearly the right decisions from a profitability and exposure management perspective.
P&C written premiums increased 4% to $137.2 million, largely on rate actions and some reduced reinsurance cost. Retention remained in line with the prior year at 85% in auto and 89% in property. New P&C sales were over $20 million, a slight decline from the prior year. While we are pleased with yet another quarter of solid P&C results, we remain focused on achieving our mid-90s target, which is comprised of a high-90s result in auto and a low 90s in property over the course of a full year.
Turning to annuity. Operating income, excluding DAC unlocking was $12.4 million, a 23% increase over the previous year. Assets under management grew by 10% from a year ago reflecting strong sales, equity market appreciation within the variable annuity book and strong deposit persistency. The annualized net interest spread for the quarter was 214, a sizable increase over 2013.
During the first quarter, we experienced an elevated level of asset-backed security prepayments, which we don't expect to continue over the remainder of the year. Excluding this elevated prepayments, the net interest spread would have been approximately 196 basis points, still a bit better than our expectations and generally in line with full year 2013. On a normalized basis, this outperformance was largely driven by stronger returns in our alternative investment portfolio.
In the life segment, operating earnings declined 9% to $3.9 million. While an elevated level of mortality losses in the first quarter isn't unusual, this quarter's results were obviously higher compared to the favorable experience in the prior year. Partially offsetting this increase was higher net investment income, which was also favorably impacted by prepayments. Life sales continued to be strong, up 6% over the prior year. Net investment income was $83 million, up 7% from prior year due to higher [indiscernible] in annuity segment and the elevated prepayment activity. Although we saw a decline in interest rates and spread tightening in the quarter, we essentially achieved our new money reinvestment target of 4.25%. We continue to look for opportunities in conservative asset classes, like investment grade corporates, municipals and high-quality asset-backed securities. Assuming a continued low rate environment, we expect to see continued pressure on portfolio yields as we move through 2014.
In total, the company's solid first quarter results generated an 8.4% increase in book value per share, excluding net unrealized gains on investments, which ended the quarter at $24.27. On a reported basis, book value increased from year end to $29.47 as the decline in interest rates and tighter spreads increased the net unrealized gain position, which was $376 million at the end of the quarter. We continue to build book value, excluding net unrealized gains on investments at a favorable rate. Our cumulative annual growth rate has been 10% for the past 5 years, and we continue to pay shareholders a compelling dividend.
We were able to find opportunities to execute on the share repurchase program in the quarter and repurchased over 135,000 shares. Since its inception, we've repurchased almost 1.4 million shares at an average price of $18.47. We have $24.5 million remaining on the authorization, and we'll continue to be opportunistic in our approach. The first quarter was a solid start to 2014. We expect our successful execution on initiatives to enhance product, distribution and infrastructure, will result in increased brand awareness and marketability within the educator space. We're confident we're on the right path and should continue to generate solid growth in both earnings and book value.
Thanks, and I'll now turn it over to Ryan to start the Q&A.