Fair Value Measurements and Derivative Instruments 2 (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Derivative [Line Items]
Fair Value Asset Derivatives Designated Foreign Exchange Contracts	$ 597,000		$ 597,000		$ 780,000
Fair Value Asset Derivatives Designated Interest Rate Swaps	11,036,000		11,036,000		15,465,000
Fair Value Liability Derivatives Designated Foreign Exchange Contracts	(5,000)		(5,000)		(79,000)
Derivative Asset Not Designated As Hedging Instruments Fair Value	5,213,000		5,213,000		3,450,000
Derivative Liability Not Designated Foreign Exchange Contracts	(4,945,000)		(4,945,000)		(1,360,000)
Derivative Assets	16,846,000		16,846,000		19,695,000
Derivative Liabilities	(4,950,000)		(4,950,000)		(1,439,000)
Derivative Assets Liabilities At Fair Value Net	11,896,000		11,896,000		18,256,000
Derivative gain (loss) recognized in interest expense	3,446,000	3,133,000	6,773,000	4,866,000
Hedged item income (expense) recognized in interest expense	(10,059,000)	(8,281,000)	(20,168,000)	(12,906,000)
Total notional amount of outstanding contracts in cash flow hedging relationships	21,000,000		21,000,000		19,000,000
Derivative Asset, Fair Value, Net	1,000,000		1,000,000
Derivative gain (loss) recognized in OCI for hedges recorded to revenue (effective portion)	(150,000)	618,000	(809,000)	303,000
Derivative gain (loss) reclassified from AOCI to income for hedges recorded to revenue (effective portion)	473,000	(122,000)	774,000	(131,000)
Derivative gain (loss) reclassified from AOCI to income for hedges recorded to cost of sales (effective portion)	(7,000)	(292,000)	(73,000)	(554,000)
Derivative gain (loss) reclassified from AOCI to income for hedges (effective portion)	466,000	(414,000)	701,000	(685,000)
Derivative gain (loss) recognized in income	1,157,000	(13,619,000)	(3,067,000)	(20,861,000)
Amount of collateral that would be required to be posted if our long-term senior unsecured debt ratings was to have fallen below BB-/Ba3	2,000,000		2,000,000
Foreign Exchange Contract Intercompany [Member]
Derivative [Line Items]
Foreign Currency Derivative Assets at Fair Value					$ 2,000,000