Other Income and Other Operating Expenses Other Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Trust income	$ 3,449	$ 0	$ 0
Wealth Management income	2,539	3,034	2,671
Bank owned life insurance income	1,201	558	460
Miscellaneous loan fees	719	599	461
Fair value marks on loans held for sale	1,170	1,646	2,614
Hedging gains (losses), net	(751)	(1,329)	(1,105)
ATM transaction fees	727	225	221
Other	960	935	207
Noninterest income, other operating income	$ 10,014	$ 5,668	$ 5,529