Supplemental Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other noninterest income
Loan fees		$ 2,853	$ 1,787	$ 1,965
Other customer service fees		2,704	2,497	2,170
Bank-owned life insurance		1,367	1,334	1,594
Other Investments	$ 1,400	2,477	1,312	(56)
Derivative Valuation		281	(24)	(320)
Other		137	20	72
Other noninterest income		9,819	6,926	5,425
Other noninterest expense
Marketing and business development		2,879	2,799	2,945
Service contracts		5,281	4,545	3,880
Professional fees		2,917	2,818	2,316
Office supplies and delivery		1,357	1,461	1,540
Other		3,677	3,517	3,544
Other noninterest expense		$ 16,111	$ 15,140	$ 14,225