CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities attributable to continuing operations:
Net income (loss) and comprehensive income (loss)	$ 69,115,000	$ (48,255,000)	$ 17,828,000
Less: Loss from discontinued operations, net of tax	4,023,000	25,689,000	21,632,000
Income (loss) from continuing operations	73,138,000	(22,566,000)	39,460,000
Adjustments to reconcile income from continuing operations to net cash provided by operating activities attributable to continuing operations:
Loss (gain) on impairments and disposal of assets	3,465,000	1,160,000	(695,000)
Amortization of intangibles	42,738,000	53,078,000	55,241,000
Depreciation	17,910,000	14,201,000	10,998,000
Non-cash compensation expense	68,555,000	53,733,000	52,167,000
Deferred income taxes	10,908,000	(9,628,000)	(8,555,000)
Change in fair value of contingent consideration	(8,249,000)	5,327,000	28,402,000
Gain on investments	(123,272,000)	0	0
Bad debt expense	2,472,000	1,785,000	1,697,000
Amortization of debt issuance costs	5,992,000	3,474,000	1,974,000
Write-off of previously-capitalized debt issuance costs	1,066,000	0	333,000
Amortization of debt discount	30,695,000	19,570,000	12,016,000
Loss on extinguishment of debt	0	7,768,000	0
Reduction in carrying amount of ROU asset, offset by change in operating lease liabilities	12,807,000	8,888,000	213,000
Changes in current assets and liabilities:
Accounts receivable	(10,289,000)	21,861,000	(22,457,000)
Prepaid and other current assets	(4,902,000)	(952,000)	(3,258,000)
Accounts payable, accrued expenses and other current liabilities	(1,537,000)	(8,013,000)	(2,322,000)
Current contingent consideration	0	(25,787,000)	(12,500,000)
Income taxes receivable	10,680,000	(10,598,000)	4,548,000
Other, net	(921,000)	(2,002,000)	(88,000)
Net cash provided by operating activities attributable to continuing operations	131,256,000	111,299,000	157,174,000
Cash flows from investing activities attributable to continuing operations:
Capital expenditures	(35,065,000)	(42,149,000)	(20,041,000)
Proceeds from the sale of fixed assets	0	0	24,077,000
Purchase of equity investment	(1,180,000)	(80,000,000)	0
Proceeds from the sale of equity investment	46,312,000	0	0
Net cash provided by (used in) investing activities attributable to continuing operations	10,067,000	(122,149,000)	(101,060,000)
Cash flows from financing activities attributable to continuing operations:
Payments related to net-share settlement of stock-based compensation, net of proceeds from exercise of stock options	(14,423,000)	(3,910,000)	(8,406,000)
Purchase of treasury stock	(40,008,000)	0	(5,470,000)
Proceeds from the issuance of 0.50% Convertible Senior Notes	0	575,000,000	0
Repurchase of 0.625% Convertible Senior Notes	0	(233,862,000)	0
Payment of convertible note hedge on the 0.50% Convertible Senior Notes	0	(124,200,000)	0
Termination of convertible note hedge on the 0.625% Convertible Senior Notes	0	109,881,000	0
Proceeds from the sale of warrants related to the 0.50% Convertible Senior Notes	0	61,180,000	0
Termination of warrants related to the 0.625% Convertible Senior Notes	0	(94,292,000)	0
Net repayment of revolving credit facility	0	(75,000,000)	(50,000,000)
Payment of debt issuance costs	(6,385,000)	(16,568,000)	(2,518,000)
Payment of original issue discount on undrawn term loan	(2,500,000)	0	0
Contingent consideration payments	0	(4,755,000)	(21,275,000)
Other financing activities	(31,000)	(184,000)	(9,000)
Net cash (used in) provided by financing activities attributable to continuing operations	(63,347,000)	193,290,000	(87,678,000)
Total cash provided by (used in) continuing operations	77,976,000	182,440,000	(31,564,000)
Discontinued operations:
Net cash provided by (used in) operating activities attributable to discontinued operations	3,317,000	(72,730,000)	(13,255,000)
Total cash provided by (used in) discontinued operations	3,317,000	(72,730,000)	(13,255,000)
Net increase (decrease) in cash, cash equivalents, restricted cash, and restricted cash equivalents	81,293,000	109,710,000	(44,819,000)
Cash, cash equivalents, restricted cash, and restricted cash equivalents at beginning of period	170,049,000	60,339,000	105,158,000
Cash, cash equivalents, restricted cash, and restricted cash equivalents at end of period	251,342,000	170,049,000	60,339,000
Non-cash investing activities:
(Decrease) increase in capital expenditures included in accounts payable and accrued expenses	(4,793,000)	4,196,000	(946,000)
Capital additions from tenant improvement allowance	0	0	1,111,000
Supplemental cash flow information:
Interest paid	8,912,000	4,741,000	7,005,000
Income tax payments	186,000	561,000	25,000
Income tax refunds	10,503,000	60,000	4,743,000
ValuePenguin
Cash flows from investing activities attributable to continuing operations:
Payments to acquire business, net of cash acquired	0	0	(105,578,000)
QuoteWizard
Adjustments to reconcile income from continuing operations to net cash provided by operating activities attributable to continuing operations:
Change in fair value of contingent consideration	(8,249,000)	3,980,000	27,103,000
Changes in current assets and liabilities:
Current contingent consideration	0
Cash flows from investing activities attributable to continuing operations:
Payments to acquire business, net of cash acquired	$ 0	$ 0	$ 482,000