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Derivatives - Summary of the terms and fair value of our outstanding derivative financial instruments (Details) - Cash Flow Hedging - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Designated as Hedging Instrument \| Interest Rate Swap
Derivative [Line Items]
Notional Amount		$ 450,000
Designated as Hedging Instrument \| Foreign Exchange Contract
Derivative [Line Items]
Notional Amount		13,448
Not Designated as Hedging Instrument, Economic Hedge \| Foreign Exchange Contract
Derivative [Line Items]
Notional Amount		$ 10,610
Other assets, net \| Designated as Hedging Instrument \| Interest Rate Swap
Derivative [Line Items]
Derivative Assets	$ 0
Derivative Liabilities	10,969
Other assets, net \| Designated as Hedging Instrument \| Foreign Exchange Contract
Derivative [Line Items]
Derivative Assets	317
Derivative Liabilities	0
Other assets, net \| Not Designated as Hedging Instrument, Economic Hedge \| Foreign Exchange Contract
Derivative [Line Items]
Derivative Assets	229
Derivative Liabilities	$ 13