Hedging Hedging - Foreign Currency (Details)	3 Months Ended				3 Months Ended
	Mar. 31, 2013 USD ($)	Mar. 31, 2013 Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2012 Foreign Exchange Forward [Member] USD ($)	Mar. 31, 2013 Transferred euro put and call options and settling in 2013 [Member] [Member] EUR (€)	Mar. 31, 2013 Sold euro call option settled in Q1 2013 [Member] Foreign Exchange Option [Member] USD ($)	Mar. 31, 2013 Purchased euro put option settled in Q2 2013 [Member] Foreign Exchange Option [Member] USD ($)	Mar. 31, 2013 Sold euro call option settled in Q2 2013 [Member] Foreign Exchange Option [Member] USD ($)	Mar. 31, 2013 purchased euro put options to settle in Q3 2013 [Member] Foreign Exchange Option [Member] USD ($)	Mar. 31, 2013 Sold euro call options settled in Q3 2013 [Member] Foreign Exchange Option [Member] USD ($)	Mar. 31, 2013 Realized gains (losses) recorded in Net Sales [Member] Foreign Exchange Option [Member] USD ($)	Mar. 31, 2013 Realized gains (losses) recorded in Net Sales [Member] [Member] Foreign Exchange Option [Member] USD ($)
Derivative [Line Items]
Foreign currency cash flow hedge unrealized losses that would be reclassified during next 12 months	$ 10,000,000
Gains (losses) on 30-day euro forward contracts		1,942,000	(3,137,000)		(620,000)	(7,000)	1,586,000	76,000	1,754,000	(620,000)	3,409,000
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred	(4,517,000)					(928,000)	(1,059,000)	(1,447,000)	(1,083,000)
Gains (losses) from fluctuations in the value of the net monetary assets exposed to euro exchange rates		(4,222,000)	4,166,000
Notional amount of currency derivatives designated cash flow hedges				€ 71,000,000