CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
INTEREST INCOME
Loans	$ 54,558	$ 55,424	$ 162,613	$ 164,519
Securities:
Taxable interest	20,345	20,511	61,652	64,896
Tax-exempt interest	9,602	8,825	28,445	25,345
Total securities income	29,947	29,336	90,097	90,241
Federal funds and resell agreements	48	45	88	73
Interest-bearing due from banks	225	628	1,422	2,633
Trading securities	201	191	842	682
Total interest income	84,979	85,624	255,062	258,148
INTEREST EXPENSE
Deposits	4,079	6,139	13,443	18,968
Federal funds and repurchase agreements	454	339	1,402	1,405
Other	81	72	390	335
Total interest expense	4,614	6,550	15,235	20,708
Net interest income	80,365	79,074	239,827	237,440
Provision for loan losses	4,500	4,500	13,500	17,200
Net interest income after provision for loan losses	75,865	74,574	226,327	220,240
NONINTEREST INCOME
Trust and securities processing	56,291	51,928	166,756	157,291
Trading and investment banking	7,120	4,952	23,938	20,449
Service charges on deposits	19,171	18,880	58,191	55,669
Insurance fees and commissions	1,028	1,038	2,949	3,407
Brokerage fees	3,104	2,627	8,324	7,540
Bankcard fees	14,466	15,882	46,031	46,869
Gain on sales of available for sale securities, net	259	2,411	20,022	15,891
Other	4,882	3,239	22,637	9,447
Total noninterest income	106,321	100,957	348,848	316,563
NONINTEREST EXPENSE
Salaries and employee benefits	78,813	74,905	236,728	220,726
Occupancy, net	9,870	9,398	28,359	28,582
Equipment	10,330	10,424	31,999	32,135
Supplies and services	4,995	5,513	15,256	16,670
Marketing and business development	7,368	4,912	17,615	14,192
Processing fees	12,964	12,704	38,372	38,197
Legal and consulting	4,311	3,272	11,838	9,965
Bankcard	4,700	4,001	13,572	12,072
Amortization of intangible assets	3,643	4,022	11,228	12,187
Regulatory fees	2,363	2,130	7,096	8,241
Class action litigation settlement				7,800
Other	6,548	8,147	20,432	19,758
Total noninterest expense	145,905	139,428	432,495	420,525
Income before income taxes	36,281	36,103	142,680	116,278
Income tax provision	10,156	10,088	41,023	33,072
NET INCOME	$ 26,125	$ 26,015	$ 101,657	$ 83,206
PER SHARE DATA
Net income - basic	$ 0.65	$ 0.65	$ 2.54	$ 2.08
Net income - diluted	$ 0.64	$ 0.64	$ 2.51	$ 2.06
Dividends	$ 0.205	$ 0.195	$ 0.615	$ 0.585
Weighted average shares outstanding	40,081,304	40,020,772	40,047,261	40,057,009