CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Balance at the beginning of the period at Dec. 31, 2012	$ 395	$ 2,824,031	$ (509,613)	$ (9,575)	$ 5,759	$ 2,310,997
Balance (in shares) at Dec. 31, 2012	39,498,912
Increase (Decrease) in Stockholders' Equity
Net income (loss)			(73,790)		95	(73,695)
Adjustment to noncontrolling interest					720	720
Preferred dividend payment on behalf of subsidiary					(12)	(12)
Interest rate swaps, net of tax $966, $184, and $(486) for the year ended December 2015, 2014 and 2013, respectively				2,542		2,542	[1]
Capitalized swap interest, net of tax $74, $199, and $635 and for the year ended December 2015, 2014 and 2013, respectively				(1,189)		(1,189)	[2]
Stock plan activity	$ 1	5,782				5,783
Stock plan activity (in shares)	77,432
Balance at the end of the period at Dec. 31, 2013	$ 396	2,829,813	(583,403)	(8,222)	6,562	2,245,146
Balance (in shares) at Dec. 31, 2013	39,576,344
Increase (Decrease) in Stockholders' Equity
Net income (loss)			(23,531)		11	(23,520)
Distribution to noncontrolling interest					(2,818)	(2,818)
Preferred dividend payment on behalf of subsidiary					(12)	(12)
Interest rate swaps, net of tax $966, $184, and $(486) for the year ended December 2015, 2014 and 2013, respectively				1,003		1,003	[1]
Capitalized swap interest, net of tax $74, $199, and $635 and for the year ended December 2015, 2014 and 2013, respectively				(493)		(493)	[2]
Stock plan activity		8,200				8,200
Stock plan activity (in shares)	61,750
Balance at the end of the period at Dec. 31, 2014	$ 396	2,838,013	(606,934)	(7,712)	3,743	2,227,506
Balance (in shares) at Dec. 31, 2014	39,638,094
Increase (Decrease) in Stockholders' Equity
Net income (loss)			126,719			126,719
Adjustment to noncontrolling interest					29	29
Interest rate swaps, net of tax $966, $184, and $(486) for the year ended December 2015, 2014 and 2013, respectively				40		40	[1]
Capitalized swap interest, net of tax $74, $199, and $635 and for the year ended December 2015, 2014 and 2013, respectively				(217)		(217)	[2]
Stock plan activity	$ 2	9,810				9,812
Stock plan activity (in shares)	76,744
Balance at the end of the period at Dec. 31, 2015	$ 398	$ 2,847,823	$ (480,215)	$ (7,889)	$ 3,772	$ 2,363,889
Balance (in shares) at Dec. 31, 2015	39,714,838

[1] Net of deferred tax expense of $1.0 million, $0.2 million and $0.5 million for the years ended December 31, 2015, 2014 and 2013, respectively.

[2] Net of deferred tax benefit of $0.1 million, $0.2 million and $0.6 million for the years ended December 31, 2015, 2014 and 2013, respectively.