Derivative Instruments and Hedging Activities Derivative Gain (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Interest Rate Swap No. 2 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract	5 years		5 years
Fair value of interest rate derivatives	$ (988)
Unrealized gain (loss) on interest rate cash flow hedges	$ (6)	$ (49)
Interest Rate Swap No. 1 [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, term of contract	10 years		10 years
Fair value of interest rate derivatives	$ (2,348)		$ (1,054)
Unrealized gain (loss) on interest rate cash flow hedges	52
Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Fair value of interest rate derivatives	(3,336)		$ (1,054)
Unrealized gain (loss) on interest rate cash flow hedges	$ 46	$ (49)