CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Rate	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Cash flows from operating activities attributable to continuing operations:
Net income and comprehensive income	$ 96,499	$ 15,578	$ 27,494
Less: Loss from discontinued operations, net of tax	12,820	3,840	3,714
Net income from continuing operations	109,319	19,418	31,208
Adjustments to reconcile income from continuing operations to net cash provided by operating activities attributable to continuing operations:
Loss on impairments and disposal of fixed assets	2,210	840	640
Amortization of intangibles	23,468	12,992	1,243
Depreciation	7,385	7,085	4,944
Rental amortization of intangibles and depreciation	630	1,474	0
Non-cash compensation expense	44,365	23,361	9,647
Deferred income taxes	(63,901)	(6,370)	6,367
Change in fair value of contingent consideration	10,788	23,931	0
Bad debt expense	880	195	515
Amortization of debt issuance costs	1,776	1,032	245
Write-off of previously-capitalized debt issuance costs	0	90	0
Amortization of convertible debt discount	11,397	6,385	0
Changes in current assets and liabilities:
Accounts receivable	(16,820)	(11,381)	(8,361)
Prepaid and other current assets	(2,985)	(5,358)	(1,558)
Accounts payable, accrued expenses and other current liabilities	14,270	31,108	4,769
Current contingent consideration	(21,912)	0	0
Income taxes receivable	3,669	(1,104)	13,385
Other, net	(591)	(160)	1,170
Net cash provided by operating activities attributable to continuing operations	123,948	103,538	64,214
Cash flows from investing activities attributable to continuing operations:
Capital expenditures	(14,907)	(8,040)	(31,955)
Acquisition of intangible assets	0	(5)	(2,030)
Acquisition of other businesses	0	0	(4,500)
Net cash used in investing activities attributable to continuing operations	(383,038)	(74,435)	(119,667)
Cash flows from financing activities attributable to continuing operations:
Proceeds from exercise of stock options, net of payments related to net-share settlement of stock-based compensation	2,217	1,602	(4,085)
Contingent consideration payments	(27,588)	0	0
Proceeds from revolving credit facility	125,000	0	0
Acquisition of noncontrolling interest	$ (499)	0	0
Interest rate | Rate	0.625%
Proceeds from the issuance of 0.625% Convertible Senior Notes	$ 0	300,000	0
Payment of convertible note hedge transactions	0	(61,500)	0
Proceeds from the sale of warrants	0	43,410	0
Proceeds from equity offering, net of offering costs	0	0	(23)
Payment of debt issuance costs	(583)	(10,486)	(8)
Purchase of treasury stock	(93,704)	(19,901)	(48,524)
Net cash provided by (used in) financing activities attributable to continuing operations	4,843	253,125	(52,640)
Total cash (used in) provided by continuing operations	(254,247)	282,228	(108,093)
Discontinued operations:
Net cash used in operating activities attributable to discontinued operations	(13,236)	(4,807)	(10,203)
Total cash used in discontinued operations	(13,236)	(4,807)	(10,203)
Net (decrease) increase in cash, cash equivalents, restricted cash, and restricted cash equivalents	(267,483)	277,421	(118,296)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	105,158	372,641	95,220
Supplemental cash flow information:
Interest	3,593	1,327	320
Income tax payments	541	20,359	3,095
Income tax refunds	5,678	133	22
QuoteWizard [Member]
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	6,800
Cash flows from investing activities attributable to continuing operations:
Payments to acquire business, net of cash acquired	(297,072)	0	0
Student Loan Hero [Member]
Cash flows from investing activities attributable to continuing operations:
Payments to acquire business, net of cash acquired	(59,483)	0	0
Ovation [Member]
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	1,600
Cash flows from investing activities attributable to continuing operations:
Payments to acquire business, net of cash acquired	(11,566)	0	0
SnapCap [Member]
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	300	700
Cash flows from investing activities attributable to continuing operations:
Payments to acquire businesses	(10)	(11,886)	0
DepositAccounts [Member]
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	2,000
Cash flows from investing activities attributable to continuing operations:
Payments to acquire businesses	0	(25,000)	0
MagnifyMoney [Member]
Cash flows from investing activities attributable to continuing operations:
Payments to acquire business, net of cash acquired	0	(29,504)	0
CompareCards [Member]
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	700	21,200
Cash flows from investing activities attributable to continuing operations:
Payments to acquire businesses	$ 0	$ 0	$ (81,182)