Condensed Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	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 (Loss)	Total
Balance at the beginning of the period at Dec. 31, 2014	$ 1	$ 3	$ 246,858	$ (1,961)	$ 12,098	$ (586)	$ 256,413
Balance at the beginning of the period (in shares) at Dec. 31, 2014	14,519	30,027
Changes in Stockholders' Equity
Net income					2,462		2,462
Stock-based compensation			1,325				1,325
Balance at the end of the period at Mar. 31, 2015	$ 1		$ 248,183	$ (1,961)	$ 14,560	$ (586)	$ 260,200
Balance at the end of the period (in shares) at Mar. 31, 2015	14,519	30,027