Consolidated Statements of Shareholders' Equity and Temporary Equity (USD $) In Thousands	Temporary Equity-Redeemable Noncontrolling Interest [Member]	Temporary Equity-Eight Percent Convertible Perpetual Preferred Stock, Series B [Member]	Eight Percent Convertible Perpetual Preferred Stock [Member]	Eight Percent Convertible Perpetual Preferred Stock, Series B [Member]	Common Stock [Member]	Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Total
Balance, beginning of period at Dec. 31, 2009			$ 140,000		$ 51	$ 571,595	$ (19,317)	$ (95,487)	$ (911)
Balance, beginning of period at Dec. 31, 2009	139,598
Balance, beginning of period, shares at Dec. 31, 2009			1,400		50,679				76
Income attributable to the redeemable noncontrolling interest	8,226						(8,226)			8,226
Limited partner distributions	(7,125)
Issuance of preferred stock, shares
Issuance costs, shares
Issuance of common stock-exercise of stock options/warrants						3,547
Issuance of common stock-exercise of stock options/warrants, shares					415
Restricted stock, net of forfeitures, shares					177
Preferred stock dividends						(5,600)
Stock-based compensation						3,559
Net loss							(69,979)			(69,979)
Other comprehensive income (loss)								(9,690)
Balance, end of period at Jun. 30, 2010			140,000		51	573,101	(97,522)	(105,177)	(911)	509,542
Balance, end of period at Jun. 30, 2010	140,699
Balance, end of period, shares at Jun. 30, 2010			1,400		51,271				76
Balance, beginning of period at Dec. 31, 2010			140,000		51	570,739	(356,866)	(101,027)	(911)	251,986
Balance, beginning of period at Dec. 31, 2010	140,851									140,851
Balance, beginning of period, shares at Dec. 31, 2010			1,400		51,271				76
Income attributable to the redeemable noncontrolling interest	7,125						(7,125)			7,125
Limited partner distributions	(32,571)
Issuance of preferred stock		70,667		84,583
Issuance of preferred stock, shares		785		940
Issuance costs		(2,493)
Issuance costs, shares
Purchase of capped-call options						(26,500)				(26,500)
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					1
Restricted stock, net of forfeitures, shares					314
Issuance costs related to preferred stock						(2,990)
Preferred stock dividends						(5,544)
Stock-based compensation						2,910
Net loss							(163,730)			(163,730)
Other comprehensive income (loss)								7,348
Balance, end of period at Jun. 30, 2011			140,000	84,583	52	538,778	(527,721)	(93,679)	(911)	141,102
Balance, end of period at Jun. 30, 2011		68,174								68,174
Balance, end of period at Jun. 30, 2011	$ 115,405									$ 115,405
Balance, end of period, shares at Jun. 30, 2011		785	1,400	940	51,616				76