Derivative Instruments - Derivative Narrative (Details) - Interest Rate Swap [Member] - Senior Secured Term Loan A [Member] - Cash Flow Hedging [Member] $ in Millions	Dec. 31, 2016 USD ($)
Maximum [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 245.0
Maximum [Member] | Derivative, June 2020 Maturity [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	2.68%
Minimum [Member]
Derivative [Line Items]
Derivative, Fixed Interest Rate	0.74%
Minimum [Member] | Derivative, June 2020 Maturity [Member]
Derivative [Line Items]
Derivative, Notional Amount	$ 192.7