Derivative Financial Instruments (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) contract	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Derivative [Line Items]
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	10 years
Reclassifications into Interest expense on cash flow hedge	$ 118,000	$ (83,000,000)
Cash pledged to Peoples from counterparties	$ 0		$ 0
Interest Rate Swap [Member]
Derivative [Line Items]
Derivative, Number of Instruments Held | contract	17
Derivative, Notional Amount	$ 160,000,000.0		160,000,000
Interest Rate Contract [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	30,235,000		10,776,000
Interest Rate Derivative Liabilities, at Fair Value	30,235,000		10,776,000
Other Assets [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Interest Rate Derivative Assets, at Fair Value	0		644,000
Liability [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Interest Rate Derivative Liabilities, at Fair Value	13,424,000		4,340,000
Interest Rate Swap [Member]
Derivative [Line Items]
Restricted Cash	$ 44,000,000.0		$ 20,000,000.0