Derivatives and Hedging Activities - Effect of Cash Flow Hedge Accounting on Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	$ (813)	$ (232)	$ (216)	$ 544
Amount of (Loss) Gain Recognized in Other Comprehensive Income from Derivatives	(401)	(131)	421	697
Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	118	231	243	486
Gain on foreign currency transactions
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	(806)	(569)	(44)	298
Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	1,040	338	170	(784)
Amount of (Loss) Gain Recognized in Other Comprehensive Income from Derivatives	(584)	(181)	693	1,033
Cash flow hedging \| Gain on foreign currency transactions
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	806	569	44	(298)
Interest rate products \| Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Other Comprehensive Income from Derivatives	0	(70)	(583)	(130)
Interest rate products \| Cash flow hedging \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	467	(31)	481	(83)
Cross-currency swap \| Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of (Loss) Gain Recognized in Other Comprehensive Income from Derivatives	(584)	(111)	1,276	1,163
Cross-currency swap \| Cash flow hedging \| Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss (Gain) Reclassified from Other Comprehensive Income into Income or Loss	$ (233)	$ (200)	$ (355)	$ (403)

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Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e637-108580

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