Deposits (Securities Pledged as Collateral Policy) (Details)	Dec. 31, 2015 USD ($) security	Dec. 31, 2014 USD ($)
Banking and Thrift [Abstract]
Number of securities pledged at FHLB (in securities) | security	2
Securities pledged at FHLB as collateral for public deposits	$ 1,200,000
Washington State Public Deposits	1,700,000
Deposits, collateral requirement	117,000
Cash and Federal Reserve Bank deposits	$ 3,000,000	$ 1,900,000