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	(37,191)	0	0	(37,191)	0
Other comprehensive loss	1,958	0	0	0	1,958
Common stock issued/cancelled under long-term incentive plans and director fees and options, net	2,363	7	2,356	0	0
Common Stock Cancelled Under Long Term Incentive Plans Net Shares		742
Balances at Mar. 31, 2014	$ 1,697,697	$ 1,035	$ 2,783,520	$ (1,083,910)	$ (2,948)
Balances, in shares at Mar. 31, 2014		103,585