CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities attributable to continuing operations:
Net income and comprehensive income	$ 15,578	$ 27,494	$ 48,047
Less: Loss from discontinued operations, net of tax	3,840	3,714	3,269
Net income from continuing operations	19,418	31,208	51,316
Adjustments to reconcile income from continuing operations to net cash provided by operating activities attributable to continuing operations:
Loss on disposal of fixed assets	840	640	748
Amortization of intangibles	12,992	1,243	149
Depreciation	7,085	4,944	3,008
Rental amortization of intangibles and depreciation	1,474	0	0
Non-cash compensation expense	23,361	9,647	8,508
Deferred income taxes	(6,370)	6,367	(29,969)
Change in fair value of contingent consideration	23,931	0	0
Bad debt expense	195	515	337
Amortization of debt issuance costs	1,032	245	47
Write-off of previously-capitalized debt issuance costs	90	0	0
Amortization of convertible debt discount	6,385	0	0
Changes in current assets and liabilities:
Accounts receivable	(11,381)	(8,361)	(16,598)
Prepaid and other current assets	(5,358)	(1,558)	(874)
Income taxes receivable	(1,104)	13,385	6,247
Accounts payable, accrued expenses and other current liabilities	31,108	4,769	13,689
Other, net	(160)	1,170	577
Net cash provided by operating activities attributable to continuing operations	103,538	64,214	37,185
Cash flows from investing activities attributable to continuing operations:
Capital expenditures	(8,040)	(31,955)	(7,237)
Acquisition of intangible assets	(5)	(2,030)	0
Acquisition of other businesses	0	(4,500)	(37)
(Increase) decrease in restricted cash	(2)	2,452	12,175
Net cash (used in) provided by investing activities attributable to continuing operations	(74,437)	(117,215)	4,901
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	$ 1,602	(4,085)	(7,612)
Interest rate	0.625%
Proceeds from the issuance of 0.625% Convertible Senior Notes	$ 300,000	0	0
Payment of convertible note hedge transactions	(61,500)	0	0
Proceeds from the sale of warrants	43,410	0	0
Proceeds from equity offering, net of offering costs	0	(23)	91,484
Payment of debt issuance costs	(10,486)	(8)	(1,215)
Purchase of treasury stock	(19,901)	(48,524)	(218)
Dividends	0	0	(131)
Net cash provided by (used in) financing activities attributable to continuing operations	253,125	(52,640)	82,308
Total cash provided by (used in) continuing operations	282,226	(105,641)	124,394
Discontinued operations:
Net cash used in operating activities attributable to discontinued operations	(4,807)	(10,203)	(3,631)
Total cash used in discontinued operations	(4,807)	(10,203)	(3,631)
Net increase (decrease) in cash and cash equivalents	277,419	(115,844)	120,763
Cash and cash equivalents at beginning of period	91,131	206,975	86,212
Cash and cash equivalents at end of period	368,550	91,131	206,975
Supplemental cash flow information:
Interest	1,327	320	60
Income tax payments	20,359	3,095	703
Income tax refunds	(133)	(22)	(96)
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	700
Cash flows from investing activities attributable to continuing operations:
Payments to acquire businesses	(11,886)	0	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	(25,000)	0	0
MagnifyMoney [Member]
Cash flows from investing activities attributable to continuing operations:
Payments to acquire businesses	(29,592)
Acquisition of MagnifyMoney, net of cash acquired	(29,504)	0	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	21,200
Cash flows from investing activities attributable to continuing operations:
Payments to acquire businesses	$ 0	$ (81,182)	$ 0