Condensed Consolidated Statements of Changes in Stockholders' Equity - 9 months ended Sep. 30, 2016 - 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 Comprehensive Loss	Total
Balance at the beginning of the period at Dec. 31, 2015	$ 1	$ 3	$ 256,551	$ (3,144)	$ 25,837	$ (607)	$ 278,641
Balance at the beginning of the period (in shares) at Dec. 31, 2015	15,342	30,027
Consolidated Statements of Changes in Stockholders' Equity
Net income					12,078		12,078
Stock-based compensation			2,522				2,522
Issuance of restricted stock				(1,111)			(1,111)
Issuance of restricted stock (in shares)	308
Repurchases of shares				(30,735)			(30,735)
Repurchase of warrants			(976)				(976)
Exercise of warrants			420				420
Exercise of warrants (in shares)	35
Exercise of stock options			155				155
Exercise of stock options (in shares)	13
Excess tax benefits, option exercise			209				209
Other comprehensive loss						(8)	(8)
Balance at the end of the period at Sep. 30, 2016	$ 1	$ 3	$ 258,881	$ (34,990)	$ 37,915	$ (615)	$ 261,195
Balance at the end of the period (in shares) at Sep. 30, 2016	15,698	30,027