Other Operating Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income and Expenses [Abstract]
Professional services	$ 4,616	$ 3,946	$ 13,896	$ 13,079
Postage	1,262	1,091	4,103	3,427
Telephone	1,248	943	4,217	3,003
Credit card expense	3,405	3,137	9,820	9,081
Marketing	2,912	1,219	6,334	4,253
Operating supplies	585	592	1,917	1,406
Amortization of intangibles	2,772	1,724	8,394	4,828
Branch right sizing expense	970	153	1,049	370
Other expense	11,904	5,458	31,623	18,588
Total other operating expenses	$ 29,674	$ 18,263	$ 81,353	$ 58,035