Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Derivatives Gain (Loss) in Statement of Finacial Position (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Current period (loss) gain on cash flow hedges	$ (2,047,000)	$ (315,000)	$ (1,159,000)	$ 861,000
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)	778,000	(944,000)	337,000	(1,564,000)
Foreign currency forward contracts \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Current period (loss) gain on cash flow hedges	(2,501,000)	557,000	(1,340,000)	2,179,000
Amount of Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(739,000)	860,000	(352,000)	1,445,000
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ (662,000)	(2,000)	(718,000)	50,000
Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)			$ (1,077,000)		$ (78,000)
Not Designated as Hedging Instrument [Member] \| Foreign currency forward contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss)		$ 317,000		$ 103,000