CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue		$ 190,439	$ 162,215	$ 367,615	$ 316,402
Expenses:
Cost of revenue	[1]	51,665	36,761	96,062	77,804
Sales and marketing	[1]	21,734	15,073	41,208	30,232
Research and development	[1]	9,349	8,835	17,868	15,939
General and administrative	[1]	53,543	55,229	106,568	109,112
Depreciation and amortization		29,910	30,632	58,341	58,566
Total operating expenses		166,201	146,530	320,047	291,653
Income from operations		24,238	15,685	47,568	24,749
Other income and (expenses):
Interest income		51	96	97	386
Interest expense		(12,864)	(14,260)	(25,992)	(28,820)
Other expense, net		(38)	(148)	(40)	(170)
Income (Loss) before taxes		11,387	1,373	21,633	(3,855)
Provision for (Benefit from) income taxes		1,807	(652)	2,897	(4,197)
Net income		9,580	2,025	18,736	342
Net income attributable to common stockholders, basic		9,333	1,964	18,242	331
New income attributable to common stockholders, diluted		$ 9,333	$ 1,964	$ 18,242	$ 331
Net income per share attributable to common stockholders, basic and diluted:
Basic net income per share (in dollars per share)		$ 0.06	$ 0.01	$ 0.12	$ 0
Diluted net income per share (in dollars per share)		$ 0.06	$ 0.01	$ 0.12	$ 0
Weighted average shares of common stock outstanding:
Basic (in shares)		150,690	149,517	150,498	149,350
Diluted (in shares)		150,765	149,685	150,658	149,521

[1] (1)Includes stock-based compensation expense as follows: Cost of revenue$264 $153 $485 $318 Sales and marketing1,136 752 2,074 1,372 Research and development363 269 683 722 General and administrative6,519 6,691 10,703 12,709 Total stock-based compensation expense$8,282 $7,865 $13,945 $15,121