Post-modification balance of TDRs Listed by type of Modification (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans, Allowance for Loan Losses and Credit Quality [Abstract]
Extended maturity	$ 2,878	$ 5,881	$ 5,044
Adjusted interest rate	57	0	92
Combination rate and maturity	38,812	568	1,035
Court ordered concession	710	1,726	1,534
Total	$ 42,457	$ 8,175	$ 7,705