fair value of Salisbury's derivative financial instrument and its classification on the Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Notional Amount [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Products	$ 10,000
Derivative Instrument Fair Value [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Products	4	$ 4
Total Derivatives designated as hedge instruments	$ 4	$ 4