Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest income:
Interest and fees on loans	$ 60,402	$ 55,565	$ 119,773	$ 109,283
Interest and dividends on investment securities:
Taxable	8,000	7,309	15,971	14,949
Exempt from federal taxes	1,040	1,083	2,099	2,180
Interest on deposits in banks	271	225	660	456
Interest on federal funds sold	5	3	7	4
Total interest income	69,718	64,185	138,510	126,872
Interest expense:
Interest on deposits	3,239	3,327	6,548	6,751
Interest on securities sold under repurchase agreements	53	63	107	129
Interest on long-term debt	538	476	1,052	949
Interest on subordinated debentures held by subsidiary trusts	600	592	1,190	1,180
Total interest expense	4,430	4,458	8,897	9,009
Net interest income	65,288	59,727	129,613	117,863
Provision for loan losses	1,340	(2,001)	2,435	(7,001)
Net interest income after provision for loan losses	63,948	61,728	127,178	124,864
Non-interest income:
Other service charges, commissions and fees	11,173	9,699	21,040	18,855
Income from the origination and sale of loans	8,802	6,380	14,708	11,040
Investment Advisory, Management and Administrative Fees	4,897	4,609	9,834	9,064
Service charges on deposit accounts	4,053	3,929	7,997	7,804
Investment securities gains, net	46	17	52	88
Other income	2,799	1,937	5,921	3,826
Total non-interest income	31,770	26,571	59,552	50,677
Non-interest expense:
Salaries and wages	26,093	24,440	51,442	46,882
Employee benefits	8,070	7,164	15,850	15,477
Occupancy, net	4,529	4,253	9,021	8,492
Furniture and equipment	3,703	3,157	7,496	6,358
Outsourced technology services	2,593	2,309	5,056	4,609
OREO expense, net of income	(823)	(134)	(884)	(153)
Professional fees	1,514	1,278	2,815	2,648
FDIC insurance premiums	1,304	1,093	2,446	2,209
Mortgage servicing rights amortization	627	583	1,246	1,183
Mortgage servicing rights impairment recovery	(56)	(11)	(71)	(56)
Core deposit intangibles amortization	854	354	1,709	708
Other expenses	13,577	10,837	25,381	21,304
Non-core acquisition expenses	(7)	597	63	597
Total non-interest expense	61,978	55,920	121,570	110,258
Income before income tax expense	33,740	32,379	65,160	65,283
Income tax expense	11,518	11,302	21,958	22,813
Net income	$ 22,222	$ 21,077	$ 43,202	$ 42,470
Basic earnings per common share	$ 0.49	$ 0.48	$ 0.95	$ 0.96
Diluted earnings per common share	$ 0.49	$ 0.47	$ 0.94	$ 0.95