Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Interest income:
Loans, including fees	$ 77,176	$ 71,026	$ 222,546	$ 208,934
Investment securities:
Taxable	20,620	24,149	67,760	76,873
Tax-exempt	2,901	2,744	8,423	8,995
Other interest income	27	39	105	133
Total interest income	100,724	97,958	298,834	294,935
Interest expense:
Savings deposits	891	898	2,669	2,684
Time deposits	2,807	2,976	8,514	9,115
Securities sold under repurchase agreements	6,041	6,150	18,097	18,474
Other borrowings	375	488	1,219	1,608
Junior subordinated interest deferrable debentures	1,019	1,063	3,088	3,201
Total interest expense	11,133	11,575	33,587	35,082
Net interest income	89,591	86,383	265,247	259,853
Provision for probable loan losses	8,832	2,816	18,976	8,539
Net interest income after provision for probable loan losses	80,759	83,567	246,271	251,314
Non-interest income:
Service charges on deposit accounts	20,627	22,514	59,669	67,026
Other service charges, commissions and fees
Banking	11,028	10,880	34,556	33,791
Non-banking	2,091	2,083	5,057	5,143
Investment securities transactions, net		(6,446)	(428)	1,283
Other investments, net	4,400	5,641	12,117	17,008
Other income	4,876	1,811	9,029	11,873
Total non-interest income	43,022	36,483	120,000	136,124
Non-interest expense:
Employee compensation and benefits	31,962	32,326	93,364	92,560
Occupancy	7,143	7,865	20,003	22,729
Depreciation of bank premises and equipment	6,240	5,937	18,798	18,083
Professional fees	3,448	3,416	10,715	10,343
Deposit insurance assessments	1,511	1,515	4,441	4,512
Net expense, other real estate owned	1,678	(55)	4,074	1,704
Amortization of identified intangible assets	161	117	441	2,246
Advertising	1,857	1,928	5,887	5,713
Early termination fee - securities sold under repurchase agreements	3,510		3,510	11,000
Impairment charges (Total other-than-temporary impairment losses, $(26), net of $223, $(8), net of $(281), $150, net of $850, and $(115), net of $(667), included in other comprehensive income)	249	273	700	552
Other	17,139	16,835	48,859	47,043
Total non-interest expense	74,898	70,157	210,792	216,485
Income before income taxes	48,883	49,893	155,479	170,953
Provision for income taxes	16,864	16,660	53,723	56,356
Net income	$ 32,019	$ 33,233	$ 101,756	$ 114,597
Basic earnings per common share:
Weighted average number of shares outstanding: (in shares)	66,449,974	66,860,997	66,430,440	66,971,555
Net income (in dollars per share)	$ 0.48	$ 0.50	$ 1.53	$ 1.71
Fully diluted earnings per common share:
Weighted average number of shares outstanding: (in shares)	66,661,841	67,016,937	66,633,913	67,119,213
Net income (in dollars per share)	$ 0.48	$ 0.50	$ 1.53	$ 1.71