David Schaeffer
Management
Okay. Those were excellent questions, Michael. Thanks. With regard to productivity, I think it's a combination of factors. It starts with underlying demand for our services which continues to be very robust. Two, it's been the dramatic improvement in our training programs and it's been the segmentation of the sales force to allow reps by appropriate tenure to focus on the correct accounts. All those initiatives and the detailed focus on productivity that Jim, I think, spreads throughout the team, has been very helpful in helping us increase our productivity on a unit basis. When you look at it on a dollar basis, we remain the lowest cost of revenue acquisition model in the industry, and pretty close to our historical trend lines with on-net Corporate, and on-net NetCentric revenue acquisitions costs at about $2 so to go (38:58) of monthly recurring revenue. And our off-net costs are higher than that. We expect those trends to continue even though ARPUs will decline. With regard to EBITDA, I'll take part of it, and Tad will take part of it. So first of all, we're talking about EBITDA as adjusted. We are going to sell some equipment but less this year than last year, just as we sold less in 2015 than we did in 2014. The margin expansion comes from the operating leverage in our business. On-net has very high contribution margins 95%; off-net, about 45%. And just to remind you, for nearly a decade from 2004 to 2012, our margins consistently increased at, at least 250 basis points a year. And for the past four years, we've seen a much more modest rate of margin expansion, more like 50 basis points on average. And there have been, really, three large impacts to our business. The first was the shutdown of our largest customer at that time Megaupload, which accounted for 11% of our NetCentric revenue, 5.5% of total revenues and nearly 25% of our EBITDA at that time they were shutdown. Secondly, this material movement in foreign exchange. And then third, the onslaught of a group of last-mile network operators constricting capacity and the need to spend money on net neutralities. So while revenues were under pressure, we also had increased legal expenses. All of those extra factors are reverting back to normal. And, I think, you saw that in the 150-basis point margin expansion this most recent quarter on a sequential basis and, I think, we'll see it going forward. I think Tad will talk a little bit about some of the other specific factors.