Derivative Instruments - Outstanding Interest Rate Derivatives (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Interest Rate Swap, 1.435
Currently-paying contracts
Notional Amount	$ 104,000	$ 104,000
Strike Rate	1.435%
Interest Rate Swap, 1.435 | Level 2
Currently-paying contracts
Fair value of derivatives	$ (2,349)	(2,773)
Interest Rate Swap, 0.779
Currently-paying contracts
Notional Amount		77,352
Strike Rate	0.779%
Interest Rate Swap, 0.779 | Level 2
Currently-paying contracts
Fair value of derivatives		(9)
Interest Rate Swap
Currently-paying contracts
Notional Amount	$ 104,000	181,352
Interest Rate Swap | Level 2
Currently-paying contracts
Fair value of derivatives	$ (2,349)	$ (2,782)