Loans Accretable yield on the purchased credit impaired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accretable yield on purchased credit impaired
Balance at the beginning of period	$ 1,403	$ 1,676	$ 2,276
Accretable yield at acquisition	602	0	0
Accretion	(385)	(255)	(557)
Disposals and other	(249)	(18)	(648)
Change in accretable yield	1,355	0	605
Balance at the end of period	$ 2,726	$ 1,403	$ 1,676