Derivatives Notional Amounts - Designated as Hedges (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	$ 166,424	$ 47,400
Gain (Loss)	243	(78)
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	110,094	207,363
Unrealized Gain (Loss)	899	11
USD / AUD | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	1,920	3,840
Unrealized Gain (Loss)	(9)	(106)
USD / CAD | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	1,623	3,888
Unrealized Gain (Loss)	(12)	32
USD / CNY | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	892	0
Unrealized Gain (Loss)	0	0
USD / EUR | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	61,494	110,905
Unrealized Gain (Loss)	528	122
USD / GBP | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	2,074	3,972
Unrealized Gain (Loss)	108	(8)
USD / NZD | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	780	2,760
Unrealized Gain (Loss)	(15)	(166)
USD / SEK | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	2,406	5,062
Unrealized Gain (Loss)	(29)	(38)
USD / MXP | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	5,573	6,763
Unrealized Gain (Loss)	(427)	346
EUR / CAD | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	1,944	0
Gain (Loss)	(54)	0
EUR / CAD | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	0	4,151
Unrealized Gain (Loss)	0	24
EUR / CHF | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	4,818	9,821
Unrealized Gain (Loss)	(130)	10
EUR / GBP | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	3,500	0
Gain (Loss)	(47)	0
EUR / GBP | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	15,942	29,824
Unrealized Gain (Loss)	621	(216)
EUR / SEK | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	43,000	0
Gain (Loss)	50	0
EUR / SEK | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	4,262	9,493
Unrealized Gain (Loss)	(68)	(46)
EUR / NOK | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	2,897	5,797
Unrealized Gain (Loss)	134	15
DKK / SEK | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	2,732	5,936
Unrealized Gain (Loss)	41	24
NOK / SEK | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	2,681	5,151
Unrealized Gain (Loss)	$ 157	$ 18