Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income:
Interest and fees on loans	$ 62,062	$ 61,007	$ 181,835	$ 170,290
Interest and dividends on investment securities:
Taxable	7,410	7,259	23,381	22,208
Exempt from federal taxes	962	1,085	3,061	3,265
Interest on deposits in banks	342	374	1,002	830
Interest on federal funds sold	4	3	11	7
Total interest income	70,780	69,728	209,290	196,600
Interest expense:
Interest on deposits	3,241	3,487	9,789	10,238
Interest on securities sold under repurchase agreements	55	52	162	181
Interest on other borrowed funds	0	27	0	27
Interest on long-term debt	544	482	1,596	1,431
Interest on subordinated debentures held by subsidiary trusts	610	598	1,800	1,778
Total interest expense	4,450	4,646	13,347	13,655
Net interest income	66,330	65,082	195,943	182,945
Provision for loan losses	1,098	261	3,533	(6,740)
Net interest income after provision for loan losses	65,232	64,821	192,410	189,685
Non-interest income:
Other service charges, commissions and fees	11,095	10,458	32,135	29,313
Income from the origination and sale of loans	7,983	7,346	22,691	18,386
Investment Advisory, Management and Administrative Fees	5,233	5,157	15,067	14,221
Service charges on deposit accounts	4,379	4,331	12,376	12,135
Investment securities gains, net	23	(8)	75	80
Other income	1,769	2,079	7,690	5,905
Total non-interest income	30,482	29,363	90,034	80,040
Non-interest expense:
Salaries and wages	25,460	25,914	76,902	72,796
Employee benefits	7,312	7,841	23,162	23,318
Occupancy, net	4,413	4,534	13,434	13,026
Furniture and equipment	3,849	3,338	11,345	9,696
Outsourced technology services	2,520	2,346	7,576	6,955
OREO expense, net of income	(720)	(58)	(1,604)	(211)
Professional fees	1,916	1,233	4,731	3,881
FDIC insurance premiums	1,190	1,172	3,636	3,381
Mortgage servicing rights amortization	617	591	1,863	1,774
Mortgage servicing rights impairment recovery	(76)	(61)	(147)	(117)
Core deposit intangibles amortization	842	688	2,551	1,396
Other expenses	12,613	12,368	37,994	33,672
Loss contingency expenses	5,000	4,000	5,000	4,000
Non-core acquisition expenses	566	1,052	629	1,649
Total non-interest expense	65,502	64,958	187,072	175,216
Income before income tax expense	30,212	29,226	95,372	94,509
Income tax expense	10,050	10,071	32,008	32,884
Net income	$ 20,162	$ 19,155	$ 63,364	$ 61,625
Basic earnings per common share	$ 0.45	$ 0.43	$ 1.40	$ 1.39
Diluted earnings per common share	$ 0.44	$ 0.42	$ 1.39	$ 1.37