Condensed Consolidated Statements of Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Statement of Other Comprehensive Income [Abstract]        
Net loss $ (21,908) $ (49,859) $ (41,909) $ (71,043)
Other comprehensive (loss) income:        
Change in net unrealized (losses) gains on cash flow hedges (320) (433) 149 (873)
Net cash flow hedge losses reclassified to operations 120 5,190 331 7,591
Total comprehensive loss $ (22,108) $ (45,102) $ (41,429) $ (64,325)