CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income:
Interest and fees on loans	$ 60,465	$ 54,681
Interest on mortgage-backed securities	5,399	4,395
Interest and dividends on investment securities:
Taxable	17	117
Tax-exempt	1,103	1,132
Other interest income	629	501
Total interest income	67,613	60,826
Interest expense:
Interest on deposits	5,240	3,075
Interest on senior debt	1,179	2,121
Interest on Federal Home Loan Bank advances	2,463	1,858
Interest on federal funds purchased and securities sold under agreements to repurchase	446	201
Interest on trust preferred borrowings	557	446
Interest on other borrowings	14	22
Total interest expense	9,899	7,723
Net interest income	57,714	53,103
Provision for loan losses	3,650	2,162
Net interest income after provision for loan losses	54,064	50,941
Noninterest income:
Credit/debit card and ATM income	9,805	8,131
Investment management and fiduciary income	9,189	8,039
Deposit service charges	4,630	4,397
Mortgage banking activities, net	1,737	1,185
Securities gains, net	21	320
Unrealized gains on equity investments	15,346	0
Loan fee income	599	549
Bank owned life insurance income	232	275
Other income	5,908	5,196
Total non interest income	47,467	28,092
Noninterest expense:
Salaries, benefits and other compensation	29,853	28,836
Occupancy expense	5,248	5,162
Equipment expense	3,089	3,124
Data processing and operations expenses	1,907	1,618
Professional fees	1,725	1,635
Marketing expense	758	624
FDIC expenses	599	529
Loan workout and OREO expenses	426	521
Corporate development expense	0	338
Recovery of fraud loss	(1,665)	0
Other operating expense	11,472	9,119
Total non interest expenses	53,412	51,506
Income before taxes	48,119	27,527
Income tax provision	10,769	8,590
Net income	$ 37,350	$ 18,937
Earnings per share:
Basic (in dollars per share)	$ 1.19	$ 0.60
Diluted (in dollars per share)	$ 1.16	$ 0.59