Hedging - Derivatives No Longer Qualifying as Hedging Instruments (Details)	6 Months Ended	3 Months Ended	6 Months Ended			6 Months Ended			6 Months Ended		6 Months Ended		6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013 Euro call and put option contracts USD ($)	Jun. 30, 2013 Transferred from Hedging to Non-hedging Instruments USD ($)	Jun. 30, 2013 Transferred from Hedging to Non-hedging Instruments Euro call and put option contracts EUR (€)	Jun. 30, 2013 Foreign exchange option, settled in Q1 2013 Purchased Euro put option EUR (€)	Jun. 30, 2013 Foreign exchange option, settled in Q1 2013 Sold Euro call option USD ($)	Jun. 30, 2013 Foreign exchange option, settled in Q1 2013 Sold Euro call option EUR (€)	Jun. 30, 2013 Foreign exchange option, settled in Q2 2013 Purchased Euro put option EUR (€)	Jun. 30, 2013 Foreign exchange option, settled in Q2 2013 Sold Euro call option USD ($)	Jun. 30, 2013 Foreign exchange option, settled in Q2 2013 Sold Euro call option EUR (€)	Jun. 30, 2013 Foreign exchange option, to settle in Q3 2013 Purchased Euro put option USD ($)	Jun. 30, 2013 Foreign exchange option, to settle in Q3 2013 Purchased Euro put option EUR (€)	Jun. 30, 2013 Foreign exchange option, to settle in Q3 2013 Sold Euro call option USD ($)	Jun. 30, 2013 Foreign exchange option, to settle in Q3 2013 Sold Euro call option EUR (€)
Derivative [Line Items]
Notional amount of currency derivatives included in transferred positions				€ 71,000,000	€ 25,000,000		€ 25,000,000	€ 19,000,000		€ 19,000,000		€ 27,000,000		€ 27,000,000
Realized Losses Recorded in Net sales	(1,127,000)					(620,000)			(507,000)
Unrealized Gains (Losses) Recorded in Net sales	1,677,000	(2,000,000)									(73,000)		1,750,000
Losses Deferred in AOCI	$ (8,458,000)		$ (2,530,000)								$ (1,447,000)		$ (1,083,000)