Condensed Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid In Capital [Member]	Treasury Stock [Member] Common Class A [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance at the beginning of the period at Dec. 31, 2013	$ 1	$ 3	$ 240,817	$ (938)	$ 1,541	$ (636)	$ 240,788
Balance at the beginning of the period (in shares) at Dec. 31, 2013	11,241	33,000
Changes in Member's Capital
Net income					5,566		5,566
Stock-based compensation			3,216				3,216
Exercise of warrants			1				1
Vesting of restricted stock			106	(969)			(863)
Vesting of restricted stock (in shares)	285
Balance at the end of the period at Jun. 30, 2014	$ 1	$ 3	$ 244,140	$ (1,907)	$ 7,107	$ (636)	$ 248,708
Balance at the end of the period (in shares) at Jun. 30, 2014	11,526	33,000