Condensed Consolidated Statements of Changes in Stockholders' Equity - 6 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands	Common Stock Common Class A	Common Stock Common Class B	Additional Paid-In Capital	Treasury Stock Common Class A	Retained Earnings	Accumulated Other Comprehensive Income	Total
Balance at the beginning of the period at Dec. 31, 2017	$ 3	$ 2	$ 265,329	$ (57,303)	$ 30,401	$ 472	$ 238,904
Balance at the beginning of the period (in shares) at Dec. 31, 2017	25,171	20,801
Condensed Consolidated Statements of Changes in Stockholders' Equity
Net loss					(12,665)		(12,665)
Stock-based compensation			1,998				1,998
Vesting of restricted stock				(326)			(326)
Vesting of restricted stock (in shares)	199
Repurchase of Class A common stock				(1,555)			(1,555)
Forfeiture of common stock earnouts (in shares)	(544)	(1,081)
Exercise of warrants			20				20
Exercise of warrants (in shares)	2
Other comprehensive income, net of tax						1,637	1,637
Balance at the end of the period at Jun. 30, 2018	$ 3	$ 2	$ 267,347	$ (59,184)	$ 17,736	$ 2,109	$ 228,013
Balance at the end of the period (in shares) at Jun. 30, 2018	24,828	19,720