Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Common Class A [Member]	Common Class B [Member]	Retained Earnings [Member]	Class A Treasury Stock [Member]	Class B Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2012	$ 15,321	$ 480,773	$ (269,288)	$ (22,398)	$ (40,303)	$ (20,170)	$ 143,935
Balance (in Shares) at Dec. 31, 2012	7,331,574	56,503,759		(1,578,554)	(4,739,462)
Net income			13,087				13,087
Issuance of common stock:
401(k) plan		21					21
401(k) plan (in Shares)		4,489
2007 Long Term Incentive Plan - restricted stock awards (in Shares)		382,062			(29,463)
2007 Long Term Incentive Plan - restricted stock awards					(256)		(256)
2007 Long Term Incentive Plan - option exercises		280					280
2007 Long Term Incentive Plan - option exercises (in Shares)		119,822
Share-based compensation		1,719					1,719
Balance at Sep. 30, 2013	$ 15,321	$ 482,793	$ (256,201)	$ (22,398)	$ (40,559)	$ (20,170)	$ 158,786
Balance (in Shares) at Sep. 30, 2013	7,331,574	57,010,132		(1,578,554)	(4,768,925)