Consolidated statements of income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans	$ 57,904	$ 44,367	$ 163,126	$ 102,723
Interest on securities
Taxable	3,151	2,399	9,137	7,555
Tax-exempt	1,031	988	2,937	3,096
Other	526	661	1,303	1,208
Total interest income	62,612	48,415	176,503	114,582
Interest expense:
Deposits	7,864	3,954	18,833	8,375
Borrowings	1,993	851	4,969	1,919
Total interest expense	9,857	4,805	23,802	10,294
Net interest income	52,755	43,610	152,701	104,288
Provision for loan losses	1,818	(784)	3,198	(1,906)
Net interest income after provision for loan losses	50,937	44,394	149,503	106,194
Noninterest income:
(Loss) gain from securities, net	(27)	254	(116)	284
Gain (loss) from other assets	326	(389)	239	(350)
Other income	1,257	1,202	4,283	2,376
Total noninterest income	34,355	37,820	103,393	104,564
Noninterest expenses:
Salaries, commissions and employee benefits	35,213	34,795	103,606	94,584
Occupancy and equipment expense	3,514	3,539	10,483	9,955
Legal and professional fees	1,917	1,512	5,925	3,973
Data processing	2,562	1,761	6,735	4,722
Merger and conversion		15,711	1,193	16,965
Amortization of core deposit and other intangibles	777	558	2,432	1,073
Loss on sale of mortgage servicing rights				249
Regulatory fees and deposit insurance assessments	738	549	2,030	1,478
Advertising	3,810	3,493	10,500	9,768
Other expense	8,060	6,783	24,936	20,666
Total noninterest expense	57,213	69,224	169,722	164,777
Income before income taxes	28,079	12,990	83,174	45,981
Income tax expense (Note 7)	6,702	4,602	19,978	16,601
Net income	$ 21,377	$ 8,388	$ 63,196	$ 29,380
Earnings per common share:
Basic	$ 0.69	$ 0.28	$ 2.05	$ 1.10
Fully diluted	0.68	$ 0.27	2.01	$ 1.08
Dividends declared per common share	$ 0.06		$ 0.12
Mortgage Banking Income
Noninterest income:
Noninterest income:	$ 26,649	$ 31,334	$ 81,664	$ 86,653
Service Charges on Deposit Accounts
Noninterest income:
Noninterest income:	2,208	2,044	6,216	5,606
ATM and Interchange Fees
Noninterest income:
Noninterest income:	2,411	2,222	7,353	6,354
Investment Services and Trust Income
Noninterest income:
Noninterest income:	1,411	1,078	3,797	2,795
Gain (Loss) on Sales or Write-Downs of Other Real Estate Owned
Noninterest income:
Noninterest income:	120	75	(43)	846
Software License and Maintenance Fees
Noninterest expenses:
Software license and maintenance fees	$ 622	$ 523	$ 1,882	$ 1,344