Mortgage Servicing Rights (Valuation allowance) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Valuation Allowance for Impairment of Recognized Servicing Assets [Line Items]
Valuation allowance	$ 0	$ 0	$ 0	$ 0	$ 3	$ 850	$ 0	$ 0
Valuation allowance provision	$ (3)	$ 0	$ (850)	$ 0