Other Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Expense
Business development and staff related	$ 6,210	$ 6,642	$ 5,684
Other loan expense	2,486	2,942	2,056
Director and shareholder expense	2,004	2,118	1,550
Property and sales tax	1,145	1,362	616
Armored carrier and courier expense	1,470	1,354	1,559
Other	8,016	7,031	7,426
Total other noninterest expense	$ 21,331	$ 21,449	$ 18,891