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:
Loans	$ 97,815	$ 88,740	$ 278,986	$ 248,708
Investment securities	8,495	7,307	26,932	21,017
Other	3,735	2,238	8,731	5,507
Total interest income	110,045	98,285	314,649	275,232
Interest expense:
Deposits	32,804	18,381	76,779	48,934
Other borrowings	2,431	3,168	9,082	6,767
FHLB advances	9,125	7,032	27,381	15,433
Subordinated debt	1,684	1,685	5,053	5,055
Total interest expense	46,044	30,266	118,295	76,189
Net interest income	64,001	68,019	196,354	199,043
Provision for loan losses	2,924	2,352	4,257	5,937
Net interest income after provision for loan losses	61,077	65,667	192,097	193,106
Non-interest income:
Bank-owned life insurance	1,869	1,672	5,769	5,297
Mortgage warehouse transactional fees	1,809	2,396	5,663	7,139
Gain on sale of SBA and other loans	1,096	1,144	3,404	3,045
Mortgage banking income	207	257	532	703
Impairment loss on investment securities	0	(8,349)	0	(12,934)
(Loss) gain on sale of investment securities	(18,659)	5,349	(18,659)	8,532
Other	6,676	3,328	13,558	7,741
Total non-interest income	2,084	18,026	39,120	59,170
Non-interest expense:
Salaries and employee benefits	25,462	24,807	78,135	69,569
Technology, communication, and bank operations	11,657	14,401	32,923	33,227
Professional services	4,743	7,403	14,563	21,142
Merger and acquisition related expenses	2,945	0	3,920	0
Occupancy	2,901	2,857	8,876	8,228
FDIC assessments, non-income taxes, and regulatory fees	2,415	2,475	6,750	6,615
Provision for operating losses	1,171	1,509	3,930	4,901
Advertising and promotion	820	404	1,529	1,108
Loan workout	516	915	1,823	1,844
Other real estate owned expenses	66	445	164	550
Other	4,408	5,824	10,521	13,634
Total non-interest expense	57,104	61,040	163,134	160,818
Income before income tax expense	6,057	22,653	68,083	91,458
Income tax expense	28	14,899	14,250	34,236
Net income (loss)	6,029	7,754	53,833	57,222
Preferred stock dividends	3,615	3,615	10,844	10,844
Net income (loss) available to common shareholders	$ 2,414	$ 4,139	$ 42,989	$ 46,378
Basic earnings per common share (usd per share)	$ 0.08	$ 0.13	$ 1.36	$ 1.52
Diluted earnings per common share (usd per share)	$ 0.07	$ 0.13	$ 1.33	$ 1.42
Interchange and card revenue
Non-interest income:
Non-interest income	$ 7,084	$ 9,570	$ 23,127	$ 31,729
Deposit fees
Non-interest income:
Non-interest income	$ 2,002	$ 2,659	$ 5,726	$ 7,918