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		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ (397)	$ (438)	$ (1,039)	$ (1,179)
Hedged Item Debt [Member] | Interest Expense, Net [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	682	(788)	3,196	(1,409)
Interest Rate Swap [Member] | Interest Expense, Net [Member]
Derivative Instruments, (Gain) Loss [Line Items]
Amount of (gain) loss recognized	$ (1,079)	$ 350	$ (4,235)	$ 230