Derivative Instruments and Hedging Activities (Details)	1 Months Ended	12 Months Ended
	Feb. 29, 2020 USD ($)	Dec. 31, 2020 USD ($) instrument
Derivatives Fair Value [Line Items]
Basis spread on variable rate		1.50%
Excess line of credit facility subject to interest rate risk		$ 50,000,000
Debt instrument, interest rate, increase (decrease)		0.50%
Long-term debt, percentage bearing fixed interest, amount		$ 200,000,000
Long-term debt, percentage bearing variable interest, amount		$ 61,000,000
Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Derivative, number of instruments held | instrument		2
Derivative, notional amount		$ 50,000,000
Derivative, amount of hedged item		50,000,000
Interest Rate Swap No. 1 [Member]
Derivatives Fair Value [Line Items]
Derivative, notional amount		$ 25,000,000
Derivative, fixed interest rate		2.50%
Derivative, maturity date		Aug. 29, 2024
Interest Rate Swap No. 2 [Member]
Derivatives Fair Value [Line Items]
Derivative, notional amount	$ 25,000,000
Derivative, fixed interest rate	1.30%
Derivative, maturity date	Feb. 28, 2025
Maximum [Member]
Derivatives Fair Value [Line Items]
Basis spread on variable rate		2.875%