CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total USD ($)	Class A Common Stock USD ($)	Class B Common Stock USD ($)	Common Stock USD ($)	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid In Capital USD ($)	Retained Earnings USD ($)	Retained Earnings Class A Common Stock USD ($)	Retained Earnings Class B Common Stock USD ($)	Accumulated Other Comprehensive Income USD ($)
Balance at Dec. 31, 2012	$ 536,702			$ 4,932			$ 132,686	$ 393,472			$ 5,612
Balance (in shares) at Dec. 31, 2012					18,694	2,271
Increase (Decrease) in Stockholders' Equity
Net income	19,475							19,475
Net change in accumulated other comprehensive income	(1,652)										(1,652)
Dividend declared Common Stock:
Dividend declared Common Stock		(6,212)	(701)						(6,212)	(701)
Stock options exercised, net of shares redeemed	111			1			110
Stock options exercised, net of shares redeemed (in shares)					5
Repurchase of Class A Common Stock	(4,095)			(43)			(1,230)	(2,822)
Repurchase of Class A Common Stock (in shares)					(193)
Conversion of Class B Common Stock to Class A Common Stock					11	(11)
Net change in notes receivable on Common Stock	76						76
Deferred director compensation expense - Company Stock	89						89
Deferred director compensation expense - Company Stock (in shares)					5
Stock based compensation expense - restricted stock	149						149
Stock based compensation expense - options	125						125
Balance at Jun. 30, 2013	$ 544,067			$ 4,890			$ 132,005	$ 403,212			$ 3,960
Balance (in shares) at Jun. 30, 2013					18,522	2,260