Financial Instruments and Fair Values - Summary of the Terms of Agreements and the Fair Value of Derivative Financial Instruments (Details) - Designated as hedging instrument - Cash flow hedging - LIBOR - Interest Rate Swap, One Month LIBOR, 2.1485% - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Notional Amount	$ 265,000,000
Pay Rate	2.1485%
Asset	$ 0	$ 0
Liability	$ (6,176,000)	$ (8,849,000)