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Borrowings - Schedule of Redemption Prices (Details) - 6.625 Senior Notes, Due 2019 [Member] - Senior Unsecured Notes [Member]
12 Months Ended
Dec. 31, 2014
2016 [Member]  
Debt Instrument [Line Items]  
Redemption Price 104.969%
2017 [Member]  
Debt Instrument [Line Items]  
Redemption Price 103.313%
2018 and Thereafter [Member]  
Debt Instrument [Line Items]  
Redemption Price 100.00%