Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Interest income:
Interest and fees on loans	$ 54,681	$ 44,562
Interest on mortgage-backed securities	4,395	3,894
Interest and dividends on investment securities:
Taxable	117	77
Tax-exempt	1,132	1,143
Other interest income	501	370
Total interest income	60,826	50,046
Interest expense:
Interest on deposits	3,075	2,118
Interest on senior debt	2,121	942
Interest on Federal Home Loan Bank advances	1,858	1,048
Interest on federal funds purchased and securities sold under agreements to repurchase	201	182
Interest on trust preferred borrowings	446	371
Interest on other borrowings	22	29
Total interest expense	7,723	4,690
Net interest income	53,103	45,356
Provision for loan losses	2,162	780
Net interest income after provision for loan losses	50,941	44,576
Noninterest income:
Credit/debit card and ATM income	8,131	6,901
Investment management and fiduciary income	8,039	5,254
Deposit service charges	4,397	4,276
Mortgage banking activities, net	1,185	1,654
Securities gains, net	320	305
Loan fee income	549	477
Bank owned life insurance income	275	231
Other income	5,196	4,570
Total non interest income	28,092	23,668
Noninterest expense:
Salaries, benefits and other compensation	28,836	22,876
Occupancy expense	5,162	4,270
Equipment expense	3,124	2,473
Professional fees	1,635	2,403
Data processing and operations expenses	1,618	1,542
Marketing expense	624	664
Loan workout and OREO expenses	521	503
FDIC expenses	529	838
Corporate development expense	338	569
Other operating expense	9,119	7,659
Total non interest expenses	51,506	43,797
Income before taxes	27,527	24,447
Income tax provision	8,590	8,677
Net income	$ 18,937	$ 15,770
Earnings per share:
Basic (in dollars per share)	$ 0.60	$ 0.53
Diluted (in dollars per share)	$ 0.59	$ 0.52