Derivatives and Hedging - Location of Gains in Consolidated Condensed Statements of Operations that were Recognized and Derivative Contract Type (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ (2,364,000)		$ 3,894,000
Interest income	119,000	$ 476,000	218,000	$ 665,000
Forward points amortized on derivatives	232,000		464,000
Other (expense) income, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Net Gain (Loss) Recognized in Income on Derivative Instruments	(595,000)	691,000	5,261,000	1,441,000
Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Forward points amortized on derivatives			0
Foreign Exchange Forward | Cost Of Goods Sold
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		242,000		565,000
Gain Reclassified from AOCI into COGS	407,000		408,000
Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI into COGS	11,463,000	553,000	18,510,000	2,251,000
Currency Swap | Other (expense) income, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI into COGS	11,046,000	2,731,000	5,735,000	35,000
Currency Swap | Interest Income
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI into COGS	417,000	2,178,000	1,730,000	2,287,000
Interest Rate Swap | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from AOCI into COGS	(1,017,000)		(1,451,000)
Designated as Hedging Instrument | Currency and Interest Rate Swap Agreements
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instrument, Notional Amount	197,352,000		197,352,000		$ 198,353,000
Designated as Hedging Instrument | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		(6,836,000)		(6,160,000)
Gain Reclassified from AOCI into COGS	11,084,000	(1,269,000)	17,935,000	2,581,000
Designated as Hedging Instrument | Cash Flow Hedging | Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(436,000)	27,000	1,974,000	573,000
Gain Reclassified from AOCI into COGS	638,000	228,000	872,000	374,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax			1,974,000
Designated as Hedging Instrument | Cash Flow Hedging | Currency Swap
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	0	(2,907,000)	15,081,000	1,164,000
Gain Reclassified from AOCI into COGS	11,463,000	(1,463,000)	18,510,000	2,251,000
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax			15,081,000
Designated as Hedging Instrument | Cash Flow Hedging | Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(1,928,000)	(3,956,000)	(13,161,000)	(7,897,000)
Gain Reclassified from AOCI into COGS	(1,017,000)	$ (34,000)	(1,447,000)	$ (44,000)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	(1,928,000)		(13,161,000)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	4,756,000		4,756,000
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ (2,364,000)		$ 3,894,000