Consolidated Statement Of Changes In Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2010	$ 935,603	$ 878,498	$ (10,546)	$ (931,431)	$ 313	$ 872,437
Balance, shares at Dec. 31, 2010	92,605,435
Comprehensive (loss):
Net (loss)		(1,668)			(22)	(1,690)
Amortization of pension and reduction in accumulated postretirement benefit obligation, net			2,753			2,753
Total comprehensive income (loss)						1,063
Distributions					(10)	(10)
Issuances of restricted stock, shares	262,120
Forfeitures of restricted stock, shares	(418,486)
Issuance of common stock	100					100
Issuance of common stock, shares	4,000
Excess (reduction in) tax benefit on options exercised and vested restricted stock	(724)					(724)
Amortization of stock-based compensation	7,702					7,702
Purchases of treasury shares				(4,708)		(4,708)
Purchases of treasury shares, shares	(172,337)
Balance at Sep. 30, 2011	$ 942,681	$ 876,830	$ (7,793)	$ (936,139)	$ 281	$ 875,860
Balance, shares at Sep. 30, 2011	92,280,732