Post-modification balance of TDRs Listed by type of Modification(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans, Allowance for Loan Losses and Credit Quality [Abstract]
Extended maturity	$ 5,044	$ 2,936	$ 3,441
Adjusted interest rate	92	0	727
Combination rate and maturity	1,035	2,199	2,640
Court ordered concession	1,534	977	837
Total	$ 7,705	$ 6,112	$ 7,645