Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total	Common stock [Member]	Additional paid-in capital [Member]	Treasury stock [Member]	Accumulated other comprehensive income (loss) [Member]	Retained earnings [Member]
Balance (in shares) at Dec. 31, 2020			60,904,638
Balance at Dec. 31, 2020		$ 426,150	$ 61	$ 544,963	$ (353,091)	$ (2,497)	$ 236,714
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(164)					(164)
Exercise of stock options and vesting of restricted stock units (in shares)			206,418
Exercise of stock options and vesting of restricted stock units		$ 0		0
Employee taxes paid for withheld shares upon equity award settlement (in shares)		240,867
Employee taxes paid for withheld shares upon equity award settlement		$ (18,426)			(18,426)
Stock-based compensation		30,005		29,995			10
Restricted stock grants (in shares)			519,009
Restricted stock grants		1	$ 1
Restricted stock cancellations (in shares)			(34,789)
Other comprehensive income		$ 6,660				6,660
Purchase of treasury shares under stock repurchase program (in shares)		465,821
Purchase of treasury shares under stock repurchase program, cost method		$ (28,066)			(28,066)
Balance (in shares) at Mar. 31, 2021			61,595,276
Balance at Mar. 31, 2021		416,160	$ 62	574,958	(399,583)	4,163	236,560
Balance (in shares) at Dec. 31, 2021			66,165,666
Balance at Dec. 31, 2021		717,060	$ 66	968,927	(500,911)	6,522	242,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss		(10,407)					(10,407)
Stock issuance costs related to purchase of EVERFI		(983)		983
Retirements of common stock (in shares)	[1]		(33,075)
Retirements of common stock	[1]	(2,581)		(2,581)
Exercise of stock options and vesting of restricted stock units (in shares)			976,312
Exercise of stock options and vesting of restricted stock units		$ 0		0
Employee taxes paid for withheld shares upon equity award settlement (in shares)		533,139
Employee taxes paid for withheld shares upon equity award settlement		$ (34,674)			(34,674)
Stock-based compensation		27,860		27,860			0
Restricted stock grants (in shares)			580,209
Restricted stock grants		2	$ 2
Restricted stock cancellations (in shares)			(30,940)
Other comprehensive income		8,773				8,773
Balance (in shares) at Mar. 31, 2022			67,658,172
Balance at Mar. 31, 2022		$ 705,050	$ 68	$ 993,223	$ (535,585)	$ 15,295	$ 232,049

[1] Represents shares retired after determining certain EVERFI's selling shareholders would be paid in cash, rather than shares of our common stock. See Note 3 for additional information regarding our acquisition of EVERFI.