Note 10. Derivative Financial Instruments (Details) - Risk Management	6 Months Ended				6 Months Ended	12 Months Ended	0 Months Ended			6 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended			6 Months Ended	12 Months Ended
	Jun. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 USD ($)	Jun. 30, 2012 Foreign Exchange Forward [Member] USD ($)	Dec. 31, 2011 Foreign Exchange Forward [Member]	Apr. 17, 2012 German Facility Agreement [Member] Interest Rate Swap [Member] USD ($)	Apr. 17, 2012 German Facility Agreement [Member] Interest Rate Swap [Member] EUR (€)	Nov. 16, 2011 German Facility Agreement [Member] Interest Rate Swap [Member] EUR (€)	Jun. 30, 2012 German Facility Agreement [Member] Interest Rate Swap [Member]	Sep. 30, 2011 Malaysian Ringgit Facility Agreement [Member] Cross Currency Interest Rate Contract [Member] MYR	Jun. 30, 2012 Malaysian Ringgit Facility Agreement [Member] Cross Currency Interest Rate Contract [Member] USD ($)	Jun. 30, 2012 Malaysian Ringgit Facility Agreement [Member] Cross Currency Interest Rate Contract [Member] USD ($)	Jun. 30, 2012 Malaysian Ringgit Facility Agreement [Member] Cross Currency Interest Rate Contract [Member] MYR	May 29, 2009 Malaysian Facility Agreement [Member] Interest Rate Swap [Member] EUR (€)	Jun. 30, 2012 Malaysian Facility Agreement [Member] Interest Rate Swap [Member] USD ($)	Jun. 30, 2011 Malaysian Facility Agreement [Member] Interest Rate Swap [Member] USD ($)	Jun. 30, 2012 Malaysian Facility Agreement [Member] Interest Rate Swap [Member] USD ($)	Jun. 30, 2011 Malaysian Facility Agreement [Member] Interest Rate Swap [Member] USD ($)	Jun. 30, 2012 Malaysian Facility Agreement [Member] Interest Rate Swap [Member] EUR (€)	Jun. 30, 2012 Cash Flow Hedging [Member] Foreign Exchange Forward [Member] USD ($)	Dec. 31, 2011 Cash Flow Hedging [Member] Foreign Exchange Forward [Member] USD ($)	Dec. 31, 2011 Cash Flow Hedging [Member] Euro Member Countries, Euro Foreign Exchange Forward [Member] USD ($)	Dec. 31, 2011 Cash Flow Hedging [Member] Euro Member Countries, Euro Foreign Exchange Forward [Member] EUR (€)	Jun. 30, 2012 Cash Flow Hedging [Member] Canada, Dollars Foreign Exchange Forward [Member] USD ($)	Jun. 30, 2012 Cash Flow Hedging [Member] Canada, Dollars Foreign Exchange Forward [Member] CAD	Dec. 31, 2011 Cash Flow Hedging [Member] Canada, Dollars Foreign Exchange Forward [Member] USD ($)	Dec. 31, 2011 Cash Flow Hedging [Member] Canada, Dollars Foreign Exchange Forward [Member] CAD	Jun. 30, 2012 Cash Flow Hedging [Member] Australia, Dollars Foreign Exchange Forward [Member] USD ($)	Jun. 30, 2012 Cash Flow Hedging [Member] Australia, Dollars Foreign Exchange Forward [Member] AUD	Dec. 31, 2011 Cash Flow Hedging [Member] Australia, Dollars Foreign Exchange Forward [Member] USD ($)	Dec. 31, 2011 Cash Flow Hedging [Member] Australia, Dollars Foreign Exchange Forward [Member] AUD	Jun. 30, 2012 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]
Interest Rate Derivatives:
Derivative, inception date									Nov. 16, 2011		Sep. 30, 2011				May 29, 2009
Notional amount of interest rate cash flow hedge derivatives									€ 50,000,000		465,000,000			465,000,000	€ 57,300,000					€ 33,800,000
Derivative, type of interest rate paid on swap										fixed rate			fixed U.S. dollar rate					fixed rate
Derivative fixed interest rate paid on swap										1.985%				3.495%						2.80%
Gain (Loss) on Discontinuation of Interest Rate Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net							(2,000,000)	(1,500,000)
Average Foreign Exchange Rate Ratio	1.30
Gain (Loss) on Interest Rate Cash Flow Hedge Ineffectiveness												0	0			0	0	0	0
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	(900,000)
Foreign Currency Derivatives:
Maximum length of time hedged in foreign currency cash flow hedge					6	12
Notional amount of foreign currency derivatives																							102,900,000	81,000,000	186,500,000	192,000,000	333,200,000	340,000,000	8,200,000	8,000,000	8,200,000	8,000,000
Derivative, average forward exchange rate	1.03	1.03	1.37	1.05
Exchange rate ratio	1.02		1.30
Unrealized gain (loss) on cash flow hedging instruments																					14,600,000	31,200,000
Foreign currency cash flow hedge gain (loss) to be reclassified during next 12 months					14,600,000
Foreign Currency Cash Flow Hedge Gain (Loss) on Discontinuation of Foreign Currency Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring to be Reclassified During Next 12 Months																					3,500,000
Unrealized gain (loss) on derivatives not designated as hedging instruments					$ (6,000,000)
Maximum remaining maturity of foreign currency derivatives																																	less than 6 months