Fair Value Measurements and Derivative Instruments 2 (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Fair Value Asset Derivatives Designated Foreign Exchange Contracts	$ 78,000	$ 780,000
Fair Value Asset Derivatives Designated Interest Rate Swaps	10,117,000	15,465,000
Fair Value Liability Derivatives Designated Foreign Exchange Contracts	(320,000)	(79,000)
Derivative Asset Not Designated As Hedging Instruments Fair Value	2,504,000	3,450,000
Derivative Liability Not Designated Foreign Exchange Contracts	(854,000)	(1,360,000)
Derivative Assets	12,699,000	19,695,000
Derivative Liabilities	(1,174,000)	(1,439,000)
Derivative Assets Liabilities At Fair Value Net	11,525,000	18,256,000
Derivative gain (loss) recognized in interest expense	9,994,000	11,583,000
Hedged item income (expense) recognized in interest expense	(31,137,000)	(33,125,000)
Total notional amount of outstanding contracts in cash flow hedging relationships	25,000,000	19,000,000
Derivative gain (loss) recognized in OCI for hedges recorded to revenue (effective portion)	(2,055,000)	2,141,000
Cash Flow Hedge Gain (Loss) Reclassified to Revenue, Net	1,298,000	(166,000)
Derivative gain (loss) reclassified from AOCI to income for hedges recorded to cost of sales (effective portion)	(185,000)	(719,000)
Derivative gain (loss) reclassified from AOCI to income for hedges (effective portion)	1,113,000	(885,000)
Foreign Currency Derivative Liabilities at Fair Value	1,000,000
Foreign Currency Derivative Assets at Fair Value	1,000,000
Derivative gain (loss) recognized in income	(4,254,000)	(17,214,000)
Foreign Exchange Contract Intercompany [Member]
Derivative [Line Items]
Foreign Currency Derivative Liabilities at Fair Value	$ 2,000,000