Derivatives and Hedging Activities - Foreign Cross Currency Derivatives (Details) - Not Designated as Hedging Instrument - Swap $ in Thousands	Jun. 30, 2020 USD ($) derivative	Dec. 31, 2019 USD ($) derivative
Derivative [Line Items]
Number of Instruments (derivative) | derivative	84	71
Notional Amount | $	$ 59,836	$ 77,031
Forward Contracts | GBP
Derivative [Line Items]
Number of Instruments (derivative) | derivative	46	38
Notional Amount | $	$ 35,132	$ 38,898
Forward Contracts | EUR
Derivative [Line Items]
Number of Instruments (derivative) | derivative	38	32
Notional Amount | $	$ 24,704	$ 27,478
Interest rate swaps, net | EUR
Derivative [Line Items]
Number of Instruments (derivative) | derivative	0	1
Notional Amount | $	$ 0	$ 10,655