CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest and fees on loans
Taxable	$ 124,830	$ 110,097	$ 105,317
Tax exempt	462	464	470
Interest and dividends on securities
Taxable	9,421	8,564	8,176
Tax exempt	3,885	3,355	3,281
Interest on short-term investments	353	59	44
Total interest income	138,951	122,539	117,288
Interest on deposits	18,944	15,415	13,568
Interest on borrowings
Short-term	352	188	388
Long-term	1,174	1,009	1,029
Total interest expense	20,470	16,612	14,985
NET INTEREST INCOME	118,481	105,927	102,303
Provision for loan losses	1,150	0	0
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	117,331	105,927	102,303
NONINTEREST INCOME
Wealth advisory fees	4,805	4,531	4,072
Investment brokerage fees	1,010	1,507	3,370
Service charges on deposit accounts	12,013	10,608	9,495
Loan, insurance and service fees	7,681	7,460	6,799
Merchant card fee income	2,098	1,843	1,549
Bank owned life insurance income	1,392	1,338	1,393
Other income	2,213	2,974	2,978
Mortgage banking income	1,586	1,176	621
Net securities gains (losses)	66	42	(224)
Total noninterest income	32,864	31,479	30,053
NONINTEREST EXPENSE
Salaries and employee benefits	41,934	38,923	38,648
Net occupancy expense	4,266	3,820	3,776
Equipment costs	3,850	3,598	3,231
Data processing fees and supplies	8,148	7,592	6,171
Corporate and business development	3,328	3,173	3,073
FDIC insurance and other regulatory fees	2,001	2,044	1,936
Professional fees	3,208	2,794	2,990
Other expense	6,243	6,262	6,341
Total noninterest expense	72,978	68,206	66,166
INCOME BEFORE INCOME TAX EXPENSE	77,217	69,200	66,190
Income tax expense	25,133	22,833	22,385
NET INCOME	$ 52,084	$ 46,367	$ 43,805
BASIC WEIGHTED AVERAGE COMMON SHARES	25,056,095	24,926,354	24,803,295
BASIC EARNINGS PER COMMON SHARE	$ 2.08	$ 1.86	$ 1.77
DILUTED WEIGHTED AVERAGE COMMON SHARES	25,460,727	25,245,569	25,172,183
DILUTED EARNINGS PER COMMON SHARE	$ 2.05	$ 1.84	$ 1.74