CONSOLIDATED STATEMENTS OF INCOME - 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	$ 67,164	$ 58,504	$ 192,071	$ 169,258
Interest on mortgage-backed securities	6,662	4,955	18,251	14,132
Interest and dividends on investment securities:
Taxable	14	14	47	137
Tax-exempt	1,065	1,125	3,260	3,387
Other interest income	510	412	1,550	1,256
Total interest income	75,415	65,010	215,179	188,170
Interest expense:
Interest on deposits	7,977	3,862	19,585	10,278
Interest on senior debt	1,179	1,807	3,538	6,049
Interest on Federal Home Loan Bank advances	2,097	2,402	7,096	6,057
Interest on federal funds purchased and securities sold under agreements to repurchase	381	273	1,261	709
Interest on trust preferred borrowings	677	500	1,871	1,418
Interest on other borrowings	7	37	28	113
Total interest expense	12,318	8,881	33,379	24,624
Net interest income	63,097	56,129	181,800	163,546
Provision for loan losses	3,716	2,896	9,864	6,901
Net interest income after provision for loan losses	59,381	53,233	171,936	156,645
Noninterest income:
Securities gains, net	0	736	21	1,764
Unrealized gains on equity investments	3,249	0	18,595	0
Realized gain on sale of equity investment	3,757	0	3,757	0
Loan fee income	693	483	1,859	1,483
Bank owned life insurance income	96	546	328	1,124
Total non interest income	41,901	32,441	124,355	92,209
Noninterest expense:
Salaries, benefits and other compensation	30,641	29,172	91,438	86,231
Occupancy expense	4,697	4,756	14,953	14,602
Equipment expense	3,258	2,922	9,523	9,544
Data processing and operations expenses	1,962	1,817	5,765	5,185
Professional fees	2,358	2,248	6,403	6,552
Marketing expense	1,499	712	3,341	2,268
Early extinguishment of debt	0	695	0	695
FDIC expenses	518	560	1,632	1,683
Loan workout and OREO expenses	(19)	484	1,088	1,504
Corporate development expense	3,794	153	4,251	857
(Recovery of) provision for legal settlement	(7,938)	0	(7,938)	0
(Recovery of) provision for fraud loss	(10)	0	(1,675)	0
Other operating expense	11,694	10,644	34,916	29,275
Total non interest expenses	52,454	54,163	163,697	158,396
Income before taxes	48,828	31,511	132,594	90,458
Income tax provision	9,893	10,942	27,569	30,382
Net income	$ 38,935	$ 20,569	$ 105,025	$ 60,076
Earnings per share:
Basic (in dollars per share)	$ 1.22	$ 0.65	$ 3.32	$ 1.91
Diluted (in dollars per share)	$ 1.20	$ 0.64	$ 3.26	$ 1.86
Credit/debit card and ATM income
Noninterest income:
Deposit service charges	$ 11,239	$ 9,350	$ 31,753	$ 26,406
Investment management and fiduciary income
Noninterest income:
Deposit service charges	10,029	8,809	29,462	25,683
Deposit service charges
Noninterest income:
Deposit service charges	4,670	4,695	13,964	13,652
Mortgage banking activities, net
Noninterest income:
Deposit service charges	1,509	1,756	4,938	4,785
Other income
Noninterest income:
Deposit service charges	$ 6,659	$ 6,066	$ 19,678	$ 17,312