CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Income:
Interest and fees on loans and leases	$ 135,170	$ 123,369	$ 122,380
Interest on loans held for sale	544	312	929
Interest on deposits with banks	98	85	84
Interest and dividends on investment securities:
Taxable	14,440	15,377	16,635
Exempt from federal income taxes	8,059	9,222	9,318
Interest on federal funds sold	1	1	1
Total interest income	158,312	148,366	149,347
Interest Expense:
Interest on deposits	5,878	4,791	5,439
Interest on retail repurchase agreements and federal funds purchased	255	164	163
Interest on advances from FHLB	13,081	12,982	12,936
Interest on subordinated debt	899	881	895
Total interest expense	20,113	18,818	19,433
Net interest income	138,199	129,548	129,914
Provision (credit) for loan and lease losses	5,371	(163)	(1,084)
Net interest income after provision (credit) for loan and lease losses	132,828	129,711	130,998
Non-interest Income:
Investment securities gains	36	5	115
Service charges on deposit accounts	7,607	8,422	8,533
Mortgage banking activities	3,114	1,994	3,094
Wealth management income	19,931	19,086	17,585
Insurance agency commissions	5,176	4,996	4,821
Income from bank owned life insurance	2,571	2,444	2,499
Visa check fees	4,652	4,439	4,165
Other income	6,814	5,485	6,699
Total non-interest income	49,901	46,871	47,511
Non-interest Expenses:
Salaries and employee benefits	71,003	66,387	65,598
Occupancy expense of premises	12,809	13,692	13,171
Equipment expenses	6,071	5,188	4,940
Marketing	2,896	2,926	2,880
Outside data services	5,023	4,947	4,580
FDIC insurance	2,491	2,302	2,300
Amortization of intangible assets	372	821	1,845
Litigation Expense	(3,869)	6,519	0
Other Expense	18,551	18,018	16,210
Total non-interest expenses	115,347	120,800	111,524
Income before income taxes	67,382	55,782	66,985
Income tax expense	22,027	17,582	22,563
Net income	$ 45,355	$ 38,200	$ 44,422
Net Income Per Share Amounts:
Basic net income per share	$ 1.84	$ 1.53	$ 1.78
Diluted net income per share	1.84	1.52	1.77
Dividends declared per share	$ 0.9	$ 0.76	$ 0.64