Other Noninterest Income and Other Noninterest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Expenses
ATM and debit card expense	$ 639	$ 783	$ 695
Supplies and printing	298	305	480
Advertising and public relations	507	456	305
Vermont franchise tax	555	538	508
FDIC insurance assessment	307	345	348
Professional fees	731	641	617
Equity in losses of limited partnerships	565	484	800
Trust expenses	409	379	377
Other expenses	3,104	2,725	2,950
Total other expenses	$ 7,115	$ 6,656	$ 7,080