Derivative Instruments and Hedging Activities (Details) (USD $)	12 Months Ended	6 Months Ended									3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended												3 Months Ended		6 Months Ended
	Dec. 31, 2011 M	Jun. 30, 2012 Interest rate swap contracts	Dec. 31, 2011 Interest rate swap contracts	Apr. 30, 2008 Interest rate swap contracts	Jun. 30, 2012 Foreign exchange contracts	Dec. 31, 2011 Foreign exchange contracts	Jun. 30, 2012 Embedded derivative in purchase and delivery contracts	Dec. 31, 2011 Embedded derivative in purchase and delivery contracts	Jun. 30, 2012 Fixed price commodity contracts	Dec. 31, 2011 Fixed price commodity contracts	Jun. 30, 2012 Designated as a hedging instrument Interest rate swap contracts	Jun. 30, 2011 Designated as a hedging instrument Interest rate swap contracts	Jun. 30, 2012 Designated as a hedging instrument Interest rate swap contracts	Jun. 30, 2011 Designated as a hedging instrument Interest rate swap contracts	Jun. 30, 2012 Not designated as hedging instruments	Jun. 30, 2011 Not designated as hedging instruments	Jun. 30, 2012 Not designated as hedging instruments	Jun. 30, 2011 Not designated as hedging instruments	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts	Jun. 30, 2011 Not designated as hedging instruments Foreign exchange contracts	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts	Jun. 30, 2011 Not designated as hedging instruments Foreign exchange contracts	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts AUD:EUR	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts AUD:EUR	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts US Dollar:EUR	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts US Dollar:EUR	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts EUR:JPY	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts MXN:US Dollar	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts MXN:US Dollar	Jun. 30, 2012 Not designated as hedging instruments Foreign exchange contracts US Dollar:CHF	Dec. 31, 2011 Not designated as hedging instruments Foreign exchange contracts US Dollar:CHF	Jun. 30, 2012 Not designated as hedging instruments Embedded derivative in purchase and delivery contracts	Jun. 30, 2011 Not designated as hedging instruments Embedded derivative in purchase and delivery contracts	Jun. 30, 2012 Not designated as hedging instruments Embedded derivative in purchase and delivery contracts	Jun. 30, 2011 Not designated as hedging instruments Embedded derivative in purchase and delivery contracts
Derivative Instruments
Fixed interest rate (as a percent)		3.80%
Variable interest rate base		three month LIBOR
Maximum typical maturity period (in months)	12
Notional amount		$ 33,800,000	$ 49,500,000	$ 90,000,000					$ 5,400,000	$ 3,900,000									$ 72,000,000		$ 72,000,000		$ 80,200,000	$ 900,000	$ 2,100,000	$ 36,000,000	$ 48,200,000	$ 200,000	$ 800,000	$ 2,500,000	$ 34,100,000	$ 27,400,000
Fair Value of Assets							1,400,000	600,000		500,000
Fair Value of Liabilities		500,000	1,100,000		2,400,000	4,200,000	300,000	400,000	400,000	500,000									2,400,000		2,400,000		4,200,000		100,000	1,200,000	2,900,000		100,000		1,100,000	1,200,000
Notional amount of derivative purchase contracts							8,000,000	4,900,000
Notional amount of foreign currency derivative purchase contracts																								700,000	1,500,000	27,500,000	35,000,000	13,700,000	700,000	2,500,000	31,200,000	24,500,000
Notional amount of derivative sale contracts							46,800,000	34,800,000
Loss recognized in other comprehensive income related to the effective portion												(200,000)	(200,000)	(300,000)
Loss reclassified from other comprehensive income and recognized in net income											(500,000)	(500,000)	(900,000)	(1,000,000)
Expected accumulated losses to be reclassified into earnings over the next twelve months		500,000
Impact on net income of unrealized gains and losses resulting from changes in fair value of derivative instruments															$ (3,800,000)	$ (300,000)	$ 2,900,000	$ 300,000	$ (5,200,000)	$ (100,000)	$ 2,000,000	$ (200,000)											$ 1,400,000	$ (200,000)	$ 900,000	$ 500,000