Other Income and Other Operating Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Professional services	$ 16,897	$ 16,685	$ 19,500
Postage	6,363	5,785	4,686
Telephone	7,685	5,947	4,262
Credit card expense	16,163	14,338	12,188
Marketing	16,499	8,410	11,141
Software and technology	25,146	15,558	2,204
Operating supplies	2,322	2,346	1,980
Amortization of intangibles	11,805	11,009	7,668
Branch right sizing expense	3,129	1,341	434
Other expense	32,843	30,156	24,816
Total other operating expenses	$ 138,852	$ 111,575	$ 88,879