Derivative Financial Instruments (The location and effect of the derivative instrument on the condensed consolidated statement of operations, pre-tax basis) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ (1,263)	$ (636)
Hedged Item Debt [Member] | Interest Expense, Net [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	2,185	3,448
Interest Rate Swap [Member] | Interest Expense, Net [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ (3,448)	$ (4,084)