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Derivative Instruments and Hedging Activities - Derivatives Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in other comprehensive income (loss)	$ (497)	$ (168)
Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount				$ 20,000
Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	16,084		$ 16,286
Derivative assets	0		0
Derivative liabilities	702		235
Total net gain (loss)	(29)	17
Gain (loss) recognized in other comprehensive income (loss)	(556)		(186)
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Notional amount	16,084		16,286
Gain (loss) recognized in other comprehensive income (loss)	(556)		(186)
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member] \| Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain (loss)	29	(16)
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member] \| Other Assets [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative assets	0		0
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Cash Flow Hedging [Member] \| Other Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities	702		$ 235
Designated as Hedging Instrument [Member] \| Interest Rate Swap [Member] \| Fair Value Hedging [Member] \| Interest Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gain (loss)	$ 0	$ 1