Consolidated Statement Of Changes In Equity (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock [Member]	Retained Earnings (Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2008	$ 917,097	$ 1,044,389	$ (42,660)	$ (929,167)	$ 2,772	$ 992,431
Balance, shares at Dec. 31, 2008	92,203,264
Comprehensive (loss):
Net (loss)		(130,027)			(821)	(130,848)
Amortization of pension and postretirement benefit cost, net			1,544			1,544
Pension settlement and curtailment costs, net			28,316			28,316
Actuarial change in pension and postretirement benefits, net			242			242
Total comprehensive (loss)						(100,746)
Distributions					1,578	1,578
Issuances of restricted stock, shares	332,741
Forfeitures of restricted stock, shares	(246,430)
Issuance of common stock, net of offering costs	718					718
Issuance of common stock, net of offering costs, shares	32,157
Excess (reduction in) tax benefit on options exercised and vested restricted stock	(801)					(801)
Amortization of stock-based compensation	7,253					7,253
Purchases of treasury shares				(957)		(957)
Purchases of treasury shares, shares	(40,281)
Balance at Dec. 31, 2009	924,267	914,362	(12,558)	(930,124)	373	896,320
Balance, shares at Dec. 31, 2009	92,281,451
Comprehensive (loss):
Net (loss)		(35,864)			(41)	(35,905)
Amortization of pension and postretirement benefit cost, net			2,012			2,012
Total comprehensive (loss)						(33,893)
Distributions					(19)	(19)
Issuances of restricted stock, shares	340,053
Forfeitures of restricted stock, shares	(152,193)
Issuance of common stock, net of offering costs	5,082					5,082
Issuance of common stock, net of offering costs, shares	178,886
Excess (reduction in) tax benefit on options exercised and vested restricted stock	(362)					(362)
Amortization of stock-based compensation	6,616					6,616
Purchases of treasury shares				(1,307)		(1,307)
Purchases of treasury shares, shares	(42,762)
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)		(330,279)			(29)	(330,308)
Amortization of pension and postretirement benefit cost, net			666			666
Total comprehensive (loss)						(329,642)
Distributions					47	47
Issuances of restricted stock, shares	262,120
Forfeitures of restricted stock, shares	(425,078)
Issuance of common stock, net of offering costs	100					100
Issuance of common stock, net of offering costs, shares	4,000
Excess (reduction in) tax benefit on options exercised and vested restricted stock	(1,897)					(1,897)
Amortization of stock-based compensation	7,659					7,659
Retirement of treasury shares	(51,151)	(885,092)		936,243
Purchases of treasury shares				(4,812)		(4,812)
Purchases of treasury shares, shares	(179,221)
Balance at Dec. 31, 2011	$ 890,314	$ (336,873)	$ (9,880)		$ 331	$ 543,892
Balance, shares at Dec. 31, 2011	92,267,256