Loans, Allowance for Credit Losses and Credit Quality Textual (Details)	3 Months Ended
	Mar. 31, 2020 USD ($) contract	Mar. 31, 2019 USD ($) contract	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Credit Loss [Abstract]
Financing Receivable, Allowance for Credit Losses, Effect of Change in Method	$ (1,137,000)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase	1,157,000
Interest Receivable	25,900,000
Loans and Leases Receivable, Allowance	(92,376,000)	$ (65,140,000)		$ (67,740,000)	$ (64,293,000)
Off-Balance Sheet, Credit Loss, Liability	$ 650,000		$ 1,100,000
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract	0	0
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	$ 24,600,000