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Borrowings - Covenants (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Debt Disclosure [Abstract]  
Debt Instrument, Covenant Compliance, Consolidated Tangible Net Worth $ 630.0
Debt Instrument, Covenant Compliance, Percent of Quarterly Net Income 65.00%
Debt Instrument, Covenant Compliance, Consolidated Tangible Net Worth at Period End $ 913.6