CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue		$ 177,176	$ 154,187
Expenses:
Cost of revenue	[1]	44,397	41,043
Sales and marketing	[1]	19,474	15,159
Research and development	[1]	8,519	7,104
General and administrative	[1]	53,025	53,883
Depreciation and amortization		28,431	27,934
Total operating expenses		153,846	145,123
Income from operations		23,330	9,064
Other income and (expenses):
Interest income		46	290
Interest expense		(13,128)	(14,560)
Other expense, net		(2)	(22)
Income (Loss) before taxes		10,246	(5,228)
Provision for (Benefit from) income taxes		1,090	(3,545)
Net income (loss)		9,156	(1,683)
Net income (loss) attributable to common stockholders, basic and diluted		$ 8,910	$ (1,683)
Net income (loss) per share attributable to common stockholders, basic and diluted:
Basic net income (loss) per share (in dollars per share)		$ 0.06	$ (0.01)
Diluted net income (loss) per share (in dollars per share)		$ 0.06	$ (0.01)
Weighted average shares of common stock outstanding:
Basic (in shares)		150,302	149,183
Diluted (in shares)		150,454	149,183

[1] (1)Includes stock-based compensation expense as follows: Cost of revenue$221 $165 Sales and marketing938 620 Research and development320 453 General and administrative4,184 6,018 Total stock-based compensation expense$5,663 $7,256