Loans Loans Nonaccretable Component Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of year	$ 0	$ 193	$ 296
Adjustment to transfer acquired loans into the Bank's existing loan portfolio	0	(193)	(79)
Balance at end of year	0	0	193
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loss recognized on acquired residential loan	$ 0	$ 0	$ (24)