CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interest income:
Interest and fees on loans and leases	$ 38,699	$ 35,531	$ 76,089	$ 70,488
Interest and dividends on investment securities:
Taxable interest	8,717	8,481	17,560	16,616
Tax-exempt interest	933	974	1,866	1,953
Dividends	3	12	18	24
Interest on deposits in other banks	117	61	201	135
Dividends on Federal Home Loan Bank stock	40	21	85	77
Total interest income	48,509	45,080	95,819	89,293
Interest on deposits:
Demand	193	154	373	294
Savings and money market	459	259	828	516
Time	4,034	2,136	7,459	3,853
Interest on short-term borrowings	48	46	91	77
Interest on long-term debt	1,103	856	2,074	1,669
Total interest expense	5,837	3,451	10,825	6,409
Net interest income	42,672	41,629	84,994	82,884
Provision (credit) for loan and lease losses	532	(2,282)	321	(2,362)
Net interest income after provision (credit) for loan and lease losses	42,140	43,911	84,673	85,246
Other operating income:
Mortgage banking income	1,775	1,957	3,622	3,900
Service charges on deposit accounts	1,977	2,120	3,980	4,156
Other service charges and fees	3,377	3,053	6,411	5,801
Income from fiduciary activities	1,017	964	1,973	1,828
Equity in earnings of unconsolidated subsidiaries	37	151	80	212
Fees on foreign exchange	277	130	488	293
Investment securities gains (losses)	0	(1,640)	0	(1,640)
Income from bank-owned life insurance	501	583	819	1,700
Loan placement fees	220	146	417	280
Net gain on sales of foreclosed assets	0	84	0	186
Other	449	322	794	1,168
Total other operating income	9,630	7,870	18,584	17,884
Other operating expense:
Salaries and employee benefits	18,783	17,983	37,288	35,370
Net occupancy	3,360	3,335	6,626	6,749
Equipment	1,044	967	2,112	1,809
Amortization of core deposit premium	668	669	1,337	1,337
Communication expense	746	891	1,644	1,791
Legal and professional services	1,769	1,987	3,590	3,779
Computer software expense	2,305	2,190	4,572	4,442
Advertising expense	617	390	1,229	782
Foreclosed asset expense	31	63	325	99
Other	4,401	3,860	8,519	7,637
Total other operating expense	33,724	32,335	67,242	63,795
Income before income taxes	18,046	19,446	36,015	39,335
Income tax expense	3,822	7,421	7,514	14,231
Net income	$ 14,224	$ 12,025	$ 28,501	$ 25,104
Per common share data:
Basic earnings per common share (in dollars per share)	$ 0.48	$ 0.39	$ 0.96	$ 0.82
Diluted earnings per common share (in dollars per share)	0.48	0.39	0.95	0.81
Cash dividends declared (in dollars per share)	$ 0.21	$ 0.18	$ 0.40	$ 0.34
Weighted average common shares outstanding used in computation:
Basic shares (in shares)	29,510,175	30,568,247	29,658,051	30,641,165
Diluted shares (in shares)	29,714,942	30,803,725	29,881,534	30,879,923