Loan Servicing - Activity pertaining to mortgage servicing rights measured using amortization method, along with aggregate activity in related valuation allowances - (Details) (Mortgage Servicing Rights MSR's, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Mortgage Servicing Rights MSR's
Mortgage servicing rights
Balances, January 1	$ 655	$ 679
Servicing rights capitalized	120	191
Amortization of servicing rights	(188)	(215)
Balance at end of year	587	655
Fair value disclosures
Fair value as of the beginning of the period	894	704
Fair value as of the end of the period	$ 876	$ 894