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Goodwill - Narrative (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Abstract]        
Goodwill impairment loss $ 420,200us-gaap_GoodwillImpairmentLoss $ 420,201us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss