Derivatives Gain (Loss) in Statement of Finacial Position (Details) (USD $)	3 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		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended	6 Months Ended					12 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014 Cash Flow Hedging [Member]	Jun. 30, 2013 Cash Flow Hedging [Member]	Jun. 30, 2014 Cash Flow Hedging [Member]	Jun. 30, 2013 Cash Flow Hedging [Member]	Jun. 30, 2014 Sales [Member]	Jun. 30, 2013 Sales [Member]	Jun. 30, 2014 Sales [Member]	Jun. 30, 2013 Sales [Member]	Jun. 30, 2014 Cost of Sales [Member]	Jun. 30, 2013 Cost of Sales [Member]	Jun. 30, 2014 Cost of Sales [Member]	Jun. 30, 2013 Cost of Sales [Member]	Jun. 30, 2014 Foreign Exchange Forward [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member]	Jun. 30, 2014 Foreign Exchange Forward [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member]	Jun. 30, 2014 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Jun. 30, 2014 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Cash Flow Hedging [Member]	Jun. 30, 2014 Foreign Exchange Forward [Member] Selling General and Administrative Expense [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Selling General and Administrative Expense [Member]	Jun. 30, 2014 Foreign Exchange Forward [Member] Selling General and Administrative Expense [Member]	Jun. 30, 2013 Foreign Exchange Forward [Member] Selling General and Administrative Expense [Member]	Jun. 30, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jun. 30, 2014 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Cash Flow Hedging [Member]	Jun. 30, 2014 Interest Rate Swap [Member] Interest Expense [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Interest Expense [Member]	Jun. 30, 2013 Interest Rate Swap [Member] Interest Expense [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Dec. 31, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Jun. 30, 2014 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Jun. 30, 2013 Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Jun. 30, 2014 EUR / AUD [Member] Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Jun. 30, 2013 EUR / AUD [Member] Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Jun. 30, 2014 EUR / NOK [Member] Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Dec. 31, 2013 EUR / NOK [Member] Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Jun. 30, 2014 EUR / CAD [Member] Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]	Dec. 31, 2013 EUR / CAD [Member] Not Designated as Hedging Instrument [Member] Foreign Exchange Forward [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in OCI on Derivatives (Effective Portion)	$ 302,000	$ (396,000)	$ (324,000)	$ 847,000													$ 310,000	$ (533,000)	$ (324,000)	$ 447,000					$ (8,000)	$ 137,000	$ 0	$ 400,000
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(340,000)	259,000	(466,000)	6,000													(328,000)	318,000	(454,000)	132,000					(12,000)	(59,000)	(12,000)	(126,000)
Derivative Instruments, Gain (Loss) Recognized in Income					(138,000)	306,000	(148,000)	442,000		31,000		(325,000)									201,000		(144,000)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	(22,000)	(22,000)	(22,000)	35,000													(22,000)	(22,000)	(22,000)	35,000					0	0	0	0
Amount of Gain (Loss) Recognized in Income on Derivatives	(389,000)	337,000	(532,000)	117,000									201,000	1,427,000	(144,000)	256,000																(144,000)	370,000	0	35,000	0	80,000	0	0	1,000	0
Derivative Instruments, Gain (Loss) Recognized in Income									$ (251,000)		$ (384,000)											$ 1,427,000		$ 256,000					$ (12,000)	$ (59,000)	$ (126,000)