Income Taxes (Unrecognized Tax Benefits) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Taxes [Abstract]      
Income (Loss) from Continuing Operations before Income Taxes, Domestic $ (368,667) $ (377,502) $ (311,575)
Unrecognized tax benefits at January 1 8,686 35,639 35,572
Additions for current year tax positions 0 0 3,118
Reductions for current year tax positions 0 0 (551)
Reductions for prior year tax positions 0 (26,519) (2,197)
Foreign currency translation adjustment (350) (434) (303)
Unrecognized tax benefits at December 31 8,336 8,686 35,639
Income (Loss) from Continuing Operations before Income Taxes, Foreign $ (1,334,554) $ (610,534) $ 387,880