CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement and Statement of Comprehensive Income [Abstract]
Revenue	$ 1,098,499	$ 909,990	$ 1,106,603
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization shown separately below)	57,297	54,494	68,379
Selling and marketing expense	773,990	617,404	735,180
General and administrative expense	153,472	129,101	116,847
Product development	52,865	43,636	39,953
Depreciation	17,910	14,201	10,998
Amortization of intangibles	42,738	53,078	55,241
Change in fair value of contingent consideration	(8,249)	5,327	28,402
Severance	53	295	1,026
Litigation settlements and contingencies	392	(943)	(151)
Total costs and expenses	1,090,468	916,593	1,055,875
Operating income (loss)	8,031	(6,603)	50,728
Other (expense) income, net:
Interest expense, net	(46,867)	(36,300)	(20,271)
Other income	123,272	376	524
Income (loss) before income taxes	84,436	(42,527)	30,981
Income tax (expense) benefit	(11,298)	19,961	8,479
Net income (loss) from continuing operations	73,138	(22,566)	39,460
Loss from discontinued operations, net of tax	(4,023)	(25,689)	(21,632)
Net income (loss) and comprehensive income (loss)	$ 69,115	$ (48,255)	$ 17,828
Weighted average shares outstanding:
Basic (in shares)	13,199	13,007	12,834
Diluted (in shares)	13,695	13,007	14,619
Income (loss) per share from continuing operations:
Basic (in dollars per share)	$ 5.54	$ (1.73)	$ 3.07
Diluted (in dollars per share)	5.34	(1.73)	2.70
Loss per share from discontinued operations:
Basic (in dollars per share)	(0.30)	(1.98)	(1.69)
Diluted (in dollars per share)	(0.29)	(1.98)	(1.48)
Net income (loss) per share:
Basic (in dollars per share)	5.24	(3.71)	1.39
Diluted (in dollars per share)	$ 5.05	$ (3.71)	$ 1.22