Derivatives - Derivative (Details) (Interest Rate Swap [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Variable Interest Rate	one-month LIBOR
Interest Rate Swap Fixed Interest Rate	0.75%
Interest Rate Cash Flow Hedge Effectiveness Assessment and Measurement	Cash flows from the Swap are expected to be highly effective. If it is determined that the Swap ceases to be effective, we will prospectively discontinue hedge accounting. When applicable, we use the shortcut method to assess hedge effectiveness. If the shortcut method is not applicable, we assess effectiveness using the “change-in-variable-cash-flows” method. Our assessment of hedge effectiveness resulted in no ineffectiveness recorded for the three months ended March 31, 2015.
Interest Rate Swap Liability	$ 0.2	$ 0.3