Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Defecit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2012	$ 950,240	$ 473	$ 274,635	$ (117,583)	$ 141	$ 792,574
Balance (Share) at Dec. 31, 2012		47,414
Stock Issued During Period, Shares, New Issues		0
Issuance of units by the Partnership to non-controlling interest	389,186	0	0	0	0	389,186
Stock-based compensation	11,224	0	5,604	0	0	5,620
Common dividends	(17,647)	0	0	(17,647)	0	0
Net loss	(89,380)	0	0	(18,851)	0	(70,529)
Conversion of restricted stock for common, net of shares withheld for taxes (Shares)		321
Adjustments Related to Tax Withholding for Share-based Compensation	(2,087)	3	(2,090)	0	0	0
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives from AOCI Included in Net Income, Net of Tax	(879)	0	0	0	(103)	(776)
Adjustment in fair value of derivatives	245	0	0	0	31	214
Non-controlling partner's impact of conversion of restricted units and options exercise	(1,191)	0	0	0	0	(1,191)
Changes in equity due to issuance of units by the Partnership	(5,961)	0	25,823	0	(62)	(31,722)
Distribution to non-controlling interest	(66,055)	0	0	0	0	(66,055)
Contribution From Non-Controlling Interest In Subsidiary	8,156	0	0	0	0	8,156
Balance at Sep. 30, 2013	$ 1,175,851	$ 476	$ 303,972	$ (154,081)	$ 7	$ 1,025,477
Balance (Share) at Sep. 30, 2013		47,735