Post-modification balance of TDRs Listed by type of Modification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Loans, Allowance for Loan Losses and Credit Quality [Abstract]
Extended maturity	$ 1,565	$ 2,878	$ 5,881
Adjusted interest rate	150	57
Combination rate and maturity	441	38,812	568
Court ordered concession	75	710	1,726
Total	$ 2,231	$ 42,457	$ 8,175