Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning Balance (in shares) at Dec. 31, 2013		85,177,532
Beginning Balance at Dec. 31, 2013	$ 2,050,238	$ 851	$ 1,813,058	$ (9,781)	$ 246,110
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	130,410				130,410
Other Comprehensive Loss	(462)			(462)
Stock Compensation	7,665		7,665
Issuance of Restricted Stock (in shares)		124,526
Issuance of Restricted Stock	0	$ 1	(1)
Issuance of Common Stock through exercise of options (in shares)		192,908
Issuance of Common Stock through exercise of options	648	$ 2	646
Ending Balance (in shares) at Jun. 30, 2014		85,494,966
Ending Balance at Jun. 30, 2014	$ 2,188,499	$ 854	1,821,368	(10,243)	376,520
Beginning Balance (in shares) at Dec. 31, 2014	85,655,438	85,655,438
Beginning Balance at Dec. 31, 2014	$ 2,296,296	$ 856	1,828,602	(26,675)	493,513
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(5,806)				(5,806)
Other Comprehensive Loss	(11,737)			(11,737)
Stock Compensation	6,735		6,735
Issuance of Common Stock in public offerings, net of related expenses (in shares)		22,425,000
Issuance of Common Stock in public offerings, net of related expenses	981,818	$ 224	981,594
Issuance of Restricted Stock (in shares)		123,543
Issuance of Restricted Stock	$ 0	$ 1	(1)
Issuance of Common Stock through exercise of options (in shares)	0
Ending Balance (in shares) at Jun. 30, 2015	108,203,981	108,203,981
Ending Balance at Jun. 30, 2015	$ 3,267,306	$ 1,081	$ 2,816,930	$ (38,412)	$ 487,707