Mortgage Servicing Rights (Details 2) - Residential mortgage loans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Changes in mortgage servicing assets
Balance at the beginning of the period	$ 4,590	$ 4,759	$ 4,733	$ 4,844
Additions	456	246	706	447
Amortization	(385)	(310)	(778)	(596)
Sales	0	0	0	0
Carrying value before valuation allowance at end of period	4,661	4,695	4,661	4,695
Changes in valuation allowance
Balance at the beginning of the period	0	0	0	0
Impairment (charges) recoveries	0	0	0	0
Balance at the end of the period	0	0	0	0
Net carrying value of mortgage servicing rights at end of period	4,661	4,695	4,661	4,695
Fair value of mortgage servicing rights at end of period	7,342	7,584	7,342	7,584
Fair value of mortgage servicing rights exceeding the carrying value	2,680	2,890	2,680	2,890
Mortgage loan contractual servicing fees, including late fees and ancillary income	$ 710	$ 750	$ 1,430	$ 1,540