Derivatives and Hedging Activities - Effect of Derivative Instruments 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 gain or (loss) recognized in OCI on derivatives	$ (426)	$ (9)	$ (426)	$ (47)
Amount of gain or (loss) reclassified from accumulated OCI into income	(152)	191	(152)	502
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) recognized in OCI on derivatives	(426)	(9)	(426)	(47)
Interest income/(expense) | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain or (loss) reclassified from accumulated OCI into income	$ (152)	$ 191	$ (152)	$ 502