Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Loans including fees:
Taxable	$ 62,130	$ 50,305
Nontaxable	2,219	2,322
Investment securities, available-for-sale:
Taxable	11,344	13,658
Nontaxable	3,580	3,521
Investment securities, held-to-maturity, taxable	4,975	6,412
Money market and other interest-earning investments	15	99
Total interest income	84,263	76,317
Interest Expense
Deposits	7,682	10,003
Short-term borrowings	127	144
Other borrowings	2,181	4,803
Total interest expense	9,990	14,950
Net interest income	74,273	61,367
Provision for loan losses	2,056	3,312
Net interest income after provision for loan losses	72,217	58,055
Noninterest Income
Wealth management fees	5,096	5,100
Service charges on deposit accounts	12,862	11,550
ATM fees	6,333	5,891
Mortgage banking revenue	559	952
Insurance premiums and commissions	9,614	10,570
Investment product fees	2,931	2,594
Company-owned life insurance	1,495	1,172
Net securities gains	619	1,499
Total other-than-temporary impairment losses	(96)	(299)
Loss recognized in other comprehensive income	0	0
Impairment losses recognized in earnings	(96)	(299)
Gain on derivatives	182	332
Gain on sale leaseback transactions	1,607	1,636
Change in FDIC indemnification asset	4,764	0
Other income	3,167	1,824
Total noninterest income	49,133	42,821
Noninterest Expense
Salaries and employee benefits	46,046	44,521
Occupancy	12,460	12,302
Equipment	2,856	2,997
Marketing	1,442	1,317
Data processing	5,469	6,065
Communication	2,824	2,334
Professional fees	2,724	2,423
Loan expense	1,608	1,087
Supplies	758	613
FDIC assessment	1,395	2,191
Other real estate owned expense	9,807	338
Amortization of intangibles	2,021	1,924
Other expense	1,877	1,813
Total noninterest expense	91,287	79,925
Income before income taxes	30,063	20,951
Income tax expense	8,340	4,518
Net income	$ 21,723	$ 16,433
Net income per common share - basic	$ 0.23	$ 0.17
Net income per common share - diluted	$ 0.23	$ 0.17
Weighted average number of common shares outstanding-basic	94,445	94,433
Weighted average number of common shares outstanding-diluted	94,833	94,670
Dividends per common share	$ 0.09	$ 0.07