Other Income and Other Operating Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Professional services	$ 4,310	$ 4,616	$ 12,125	$ 13,896
Postage	1,471	1,262	4,642	4,103
Telephone	2,507	1,248	5,605	4,217
Credit card expense	4,200	3,405	11,822	9,820
Marketing	7,021	2,912	12,514	6,334
Software and technology	6,531	4,733	16,607	10,716
Operating supplies	493	585	1,671	1,917
Amortization of intangibles	2,947	2,772	8,535	8,394
Branch right sizing expense	160	970	3,092	1,049
Other expense	8,239	7,171	24,195	20,907
Total other operating expenses	$ 37,879	$ 29,674	$ 100,808	$ 81,353