Goodwill and Core Deposit Intangibles CDI Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Gross amount of CDI:
Balance, beginning of year	$ 7,876	$ 7,876	$ 3,110
Additions due to acquisitions	2,906	0	4,766
Balance, end of year	10,782	7,876	7,876
Accumulated Amortization
Balance, beginning of year	(2,262)	(1,248)	(484)
Amortization	(1,350)	(1,014)	(764)
Balance, end of year	(3,612)	(2,262)	(1,248)
Net CDI, end of year	$ 7,170	$ 5,614	$ 6,628