Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Balances at Dec. 31, 2013	$ 1,730,567	$ 1,028	$ 2,781,164	$ (1,046,719)	$ (4,906)
Balances, in shares at Dec. 31, 2013		102,843
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(80,312)	0	0	(80,312)	0
Other comprehensive loss	1,775	0	0	0	1,775
Common stock issued/cancelled under long-term incentive plans and director fees and options, net	4,603	6	4,597	0	0
Common stock issued/cancelled under long-term incentive plans and director fees and options, net, in shares		643
Balances at Jun. 30, 2014	$ 1,656,633	$ 1,034	$ 2,785,761	$ (1,127,031)	$ (3,131)
Balances, in shares at Jun. 30, 2014		103,486