Consolidated Statements Of Temporary Equity And Shareholders' Equity (USD $) In Thousands	Temporary Equity-Redeemable Noncontrolling Interest [Member]	Temporary Equity-Eight Percent Convertible Perpetual Preferred Stock [Member]	Eight Percent Convertible Perpetual Preferred Stock [Member]	Common Stock [Member]	Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock At Cost [Member]	Total
Balance, beginning of year at Dec. 31, 2010			$ 140,000	$ 51	$ 570,739	$ (356,866)	$ (101,027)	$ (911)
Balance, beginning of year at Dec. 31, 2010
Balance, beginning of year at Dec. 31, 2010	140,851
Balance, beginning of year, shares at Dec. 31, 2010			1,400	51,268				76
Less income attributable to the redeemable noncontrolling interest	3,563					(3,563)			(3,563)
Limited partner distributions	(3,563)
Shareholders' equity transfers
Temporary equity transfers
Temporary equity transfers, shares
Issuance of common stock - exercise of stock options/warrants					163
Issuance of common stock - exercise of stock options/warrants, shares				31
Restricted stock, net of forfeitures
Restricted stock, net of forfeitures, shares				108
Stock-based compensation					1,431
Preferred stock dividends					(2,758)
Conversion to common stock
Conversion of preferred stock
Conversion of preferred stock,shares
Conversion to common stock,shares
Net loss						(113,226)			(113,226)
Other comprehensive income							8,415
Balance, end of year at Mar. 31, 2011			140,000	51	569,575	(473,655)	(92,612)	(911)	142,448
Balance, end of year at Mar. 31, 2011
Balance, end of year at Mar. 31, 2011	140,851
Balance, end of year, shares at Mar. 31, 2011			1,400	51,407				76
Balance, beginning of year at Dec. 31, 2011			222,681	52	529,669	(548,765)	(106,392)	(911)	96,334
Balance, beginning of year at Dec. 31, 2011		70,055							70,055
Balance, beginning of year at Dec. 31, 2011	115,820								115,820
Balance, beginning of year, shares at Dec. 31, 2011		807	2,318	51,959				76
Less income attributable to the redeemable noncontrolling interest	7,379					(7,379)			(7,379)
Limited partner distributions	(7,380)
Shareholders' equity transfers		1,131
Shareholders' equity transfers, shares		(16)
Temporary equity transfers			(1,131)
Temporary equity transfers, shares			16
Issuance of common stock - exercise of stock options/warrants					14
Issuance of common stock - exercise of stock options/warrants, shares				3
Restricted stock, net of forfeitures
Restricted stock, net of forfeitures, shares
Stock-based compensation					1,599
Preferred stock dividends					(6,179)
Conversion to common stock			(2,000)
Conversion of preferred stock					2,000
Conversion of preferred stock,shares				90
Conversion to common stock,shares			(20)
Net loss						(131,521)			(131,521)
Other comprehensive income							13,819
Balance, end of year at Mar. 31, 2012			219,550	52	527,103	(687,665)	(92,573)	(911)	(34,444)
Balance, end of year at Mar. 31, 2012		71,186							71,186
Balance, end of year at Mar. 31, 2012	$ 115,819								$ 115,819
Balance, end of year, shares at Mar. 31, 2012		791	2,314	52,052				76