CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
Revenue		$ 102,657	$ 93,633
Expenses:
Cost of revenue	[1]	41,923	31,851
Sales and marketing	[1]	6,559	1,850
Research and development	[1]	5,932	5,411
General and administrative	[1]	36,552	24,258
Depreciation and amortization		8,394	4,915
Total operating expenses		99,360	68,285
Income from operations		3,297	25,348
Other income and (expenses):
Realized losses on short-term investments		(4)
Gain on disposal of equipment		534
Interest income		1,442	8
Interest expense		(1,259)	(1,103)
Income before taxes		4,010	24,253
Provision for income taxes		1,645	10,494
Net income		2,365	13,759
Net income attributable to common stockholders, basic and diluted		$ 2,356	$ 13,759
Net income per share attributable to common stockholders, basic and diluted:
Basic net income per share (in dollars per share)		$ 0.02	$ 0.10
Diluted net income per share (in dollars per share)		$ 0.02	$ 0.10
Weighted average shares of common stock outstanding:
Basic (in shares)		151,282	135,331
Diluted (in shares)		152,355	138,902

[1] Includes stock-based compensation expense as follows: Three months ended March 31, 2016: Cost of revenue 119; Sales and marketing 154; Research and development 242; General and administrative 1,577; Total stock-based compensation expense 2,092. Three months ended March 31, 2015: Cost of revenue 28; Sales and marketing 15; Research and development 362; General and administrative 1,367; Total stock-based compensation expense 1,772.