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)	(76,846)	0	0	(76,846)	0
Other comprehensive loss	1,579	0	0	0	1,579
Common stock issued/cancelled under long-term incentive plans and director fees and options, net	6,940	6	6,934	0	0
Common stock issued/cancelled under long-term incentive plans and director fees and options, net, in shares		596
Balances at Sep. 30, 2014	$ 1,662,240	$ 1,034	$ 2,788,098	$ (1,123,565)	$ (3,327)
Balances, in shares at Sep. 30, 2014		103,439