Commitments and Contingencies - Long Term Debt Commitments (Details) - Secured Debt [Member] $ in Millions	Jun. 30, 2016 USD ($)
Debt Instrument [Line Items]
Repayments of interest and fee commitments, remainder of 2016	$ 20.2
Repayments of interest and fee commitments, in 2017	37.5
Repayments of interest and fee commitments, in 2018	34.0
Repayments of interest and fee commitments, in 2019	30.7
Repayments of interest and fee commitments, in 2020	27.4
Repayments of interest and fee commitments, 2021 and beyond	106.6
Long-term Debt, Fiscal Year Maturity [Abstract]
Remainder of 2016	3.2
2017	23.7
2018	16.4
2019	14.9
2020	14.2
2021 and beyond	$ 131.2