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	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ 586	$ (937)	$ (677)	$ (1,573)
Hedged Item Debt [Member] | Interest Expense, Net [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	(2,671)	3,613	(486)	7,061
Interest Rate Swap [Member] | Interest Expense, Net [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ 3,257	$ (4,550)	$ (191)	$ (8,634)