Derivatives and Hedging Instruments - Effects of Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative [Line Items]
Gain (Loss) Recognized in OCI	$ (630)	$ (868)	$ (5,371)	$ (2,483)
Foreign currency exchange contracts \| Cash Flow Hedging \| Other expense
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	(436)	(2,281)	(263)	(9,221)
Interest rate cap contracts \| Cash Flow Hedging \| Interest expense
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income on Derivative	0	289	0	(1,427)
Derivatives Designated as Hedging Instruments \| Foreign currency exchange contracts \| Cash Flow Hedging \| Salaries and employee benefits
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(323)	(916)	1,068	(1,990)
Gain (Loss) Reclassified from OCI into Income	198	95	183	1,078
Derivatives Designated as Hedging Instruments \| Foreign currency exchange contracts \| Cash Flow Hedging \| General and administrative expenses
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(48)	(130)	(57)	(206)
Gain (Loss) Reclassified from OCI into Income	27	11	(44)	46
Derivatives Designated as Hedging Instruments \| Interest rate swap agreements \| Cash Flow Hedging \| Interest expense
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(800)	3	(7,182)	(9)
Gain (Loss) Reclassified from OCI into Income	(742)	4	(1,606)	29
Derivatives Designated as Hedging Instruments \| Interest rate cap contracts \| Cash Flow Hedging \| Interest expense
Derivative [Line Items]
Gain (Loss) Recognized in OCI	(145)	0	(1,857)	0
Gain (Loss) Reclassified from OCI into Income	$ 0	$ 0	$ 0	$ 0

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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-Name Accounting Standards Codification
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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.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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.

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