Consolidated Statements of Changes in Stockholders' Equity - 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) Income	Total
Balance at the beginning of the period at Dec. 31, 2012			$ 34,608		$ 5,838	$ (787)	$ 39,659
Consolidated Statements of Changes in Stockholders' Equity
Consummation of the Transaction (April 4, 2013)	$ 1	$ 3	198,992				198,996
Consummation of the Transaction (April 4, 2013) (in shares)	10,991	33,000
Net income (loss)					(4,297)		(4,297)
Issuance of restricted stock			2,102				2,102
Issuance of restricted stock (in shares)	250
Excess of tax benefits related to the issuance of restricted stock			25				25
Stock-based compensation			5,090				5,090
Repurchases of Class A Common Stock				$ (938)			(938)
Other comprehensive income (loss), net of tax						151	151
Balance at the end of the period at Dec. 31, 2013	$ 1	$ 3	240,817	(938)	1,541	(636)	240,788
Balance at the end of the period (in shares) at Dec. 31, 2013	11,241	33,000
Consolidated Statements of Changes in Stockholders' Equity
Net income (loss)					10,557		10,557
Issuance of restricted stock			2,908				2,908
Issuance of restricted stock (in shares)	305
Excess of tax benefits related to the issuance of restricted stock			120				120
Stock-based compensation			3,012				3,012
Repurchases of Class A Common Stock				(1,023)			(1,023)
Exercise of warrants			1				1
Conversion of Class B Common Stock to Class A Common Stock (in shares)	2,973	(2,973)
Other comprehensive income (loss), net of tax						50	50
Balance at the end of the period at Dec. 31, 2014	$ 1	$ 3	246,858	(1,961)	12,098	(586)	256,413
Balance at the end of the period (in shares) at Dec. 31, 2014	14,519	30,027
Consolidated Statements of Changes in Stockholders' Equity
Net income (loss)					13,739		13,739
Issuance of restricted stock			2,522				2,522
Issuance of restricted stock (in shares)	324
Excess of tax benefits related to the issuance of restricted stock			272				272
Stock-based compensation			3,053				3,053
Repurchases of Class A Common Stock				(1,183)			(1,183)
Issuance of Class A Common Stock			5,407				5,407
Issuance of Class A Common Stock (in shares)	479
Repurchase of warrants			(1,778)				(1,778)
Exercise of warrants			60				60
Exercise of warrants (in shares)	5
Exercise of stock options			157				157
Exercise of stock options (in shares)	15
Other comprehensive income (loss), net of tax						(21)	(21)
Balance at the end of the period at Dec. 31, 2015	$ 1	$ 3	$ 256,551	$ (3,144)	$ 25,837	$ (607)	$ 278,641
Balance at the end of the period (in shares) at Dec. 31, 2015	15,342	30,027