CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue		$ 192,230	$ 161,377	$ 559,845	$ 477,779
Expenses:
Cost of revenue	[1]	54,951	39,561	151,013	117,365
Sales and marketing	[1]	21,098	14,898	62,306	45,130
Research and development	[1]	9,569	7,941	27,437	23,880
General and administrative	[1]	55,389	54,865	161,957	163,977
Depreciation and amortization		29,647	28,183	87,988	86,749
Impairment charge		2,954	0	2,954	0
Total operating expenses		173,608	145,448	493,655	437,101
Income from operations		18,622	15,929	66,190	40,678
Other income and (expenses):
Interest income		69	50	166	436
Interest expense		(12,999)	(13,648)	(38,991)	(42,468)
Other expense, net		(728)	(332)	(768)	(502)
Income (Loss) before taxes		4,964	1,999	26,597	(1,856)
(Benefit from) Provision for income taxes		(6,771)	1,175	(3,874)	(3,022)
Net income		11,735	824	30,471	1,166
Net income attributable to common stockholders, basic		11,410	800	29,654	1,130
New income attributable to common stockholders, diluted		$ 11,410	$ 800	$ 29,654	$ 1,130
Net income per share attributable to common stockholders, basic and diluted:
Basic net income per share (in dollars per share)		$ 0.08	$ 0.01	$ 0.20	$ 0.01
Diluted net income per share (in dollars per share)		$ 0.08	$ 0.01	$ 0.20	$ 0.01
Weighted average shares of common stock outstanding:
Basic (in shares)		150,873	149,720	150,624	149,474
Diluted (in shares)		150,952	149,903	150,728	149,650

[1] (1)Includes stock-based compensation expense as follows: Cost of revenue$327 $156 $812 $474 Sales and marketing1,259 717 3,333 2,089 Research and development427 287 1,110 1,009 General and administrative6,403 6,853 17,106 19,562 Total stock-based compensation expense$8,416 $8,013 $22,361 $23,134