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 income (loss):
Net income (loss)		763			(16)	747
Amortization of pension and reduction in accumulated postretirement benefit obligation, net			4,692			4,692
Total comprehensive income (loss)						5,439
Distributions					(9)	(9)
Issuances of restricted stock, shares	261,214
Forfeitures of restricted stock, shares	(416,846)
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	(725)					(725)
Amortization of stock-based compensation	7,590					7,590
Purchases of treasury shares				(4,708)		(4,708)
Purchases of treasury shares, shares	(172,337)
Balance at Jun. 30, 2011	$ 942,568	$ 879,261	$ (5,854)	$ (936,139)	$ 288	$ 880,124
Balance, shares at Jun. 30, 2011	92,281,466