CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Common Stock	Additional Paid In Capital.	Retained Earnings Class A Common Stock	Retained Earnings Class B Common Stock	Retained Earnings	Accumulated Other Comprehensive Income	Class A Common Stock	Class B Common Stock	Total
Balance at Dec. 31, 2014			$ 4,904	$ 134,889			$ 414,623	$ 4,315			$ 558,731
Balance (in shares) at Dec. 31, 2014	18,603	2,245
Increase (Decrease) in Stockholders' Equity
Net income							27,748				27,748
Net change in accumulated other comprehensive income								49			49
Dividend declared Common Stock:
Dividend declared Common Stock					$ (10,850)	$ (1,190)			$ (10,850)	$ (1,190)
Stock options exercised, net of shares redeemed			4	305			(65)				244
Stock options exercised, net of shares redeemed (in shares)	14
Repurchase of Class A Common Stock			(4)	(124)			(349)				(477)
Repurchase of Class A Common Stock (in shares)	(19)
Net change in notes receivable on Common Stock				(25)							(25)
Deferred director compensation expense - Common Stock				171							171
Deferred director compensation expense - Common Stock (in shares)	5
Stock based compensation - restricted stock				207							207
Stock based compensation expense - stock options				104							104
Balance at Sep. 30, 2015			$ 4,904	$ 135,527			$ 429,917	$ 4,364			$ 574,712
Balance (in shares) at Sep. 30, 2015	18,603	2,245