Derivative Instruments and Hedging Activities (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) instrument
Derivatives, Fair Value [Line Items]
Basis spread on variable rate	1.375%
Excess line of credit facility subject to interest rate risk	$ 50,000,000
Long-term debt, percentage bearing fixed interest, amount	200,000,000
Long-term debt, percentage bearing variable interest, amount	$ 104,000,000
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	2.00%