Consolidated Statements Of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest income
Interest and fees on loans	$ 142,114	$ 143,555
Interest bearing deposits with banks	569	248
Federal funds sold and securities purchased under resale agreements	15	12
Securities	8,752	11,847
Trading account securities	5	9
Federal Home Loan Bank and Federal Reserve Bank stock	684	604
Brokerage customer receivables	174	211
Total interest income	152,313	156,486
Interest expense
Interest on deposits	14,504	18,030
Interest on Federal Home Loan Bank advances	2,764	3,584
Interest on notes payable and other borrowings	1,154	3,102
Interest on secured borrowings-owed to securitization investors	0	2,549
Interest on subordinated notes	59	169
Interest on junior subordinated debentures	3,119	3,157
Total interest expense	21,600	30,591
Net interest income	130,713	125,895
Provision for credit losses	15,687	17,400
Net interest income after provision for credit losses	115,026	108,495
Non-interest income
Wealth management	14,828	12,401
Mortgage banking	30,145	18,534
Service charges on deposit accounts	4,793	4,208
Gains on available-for-sale securities, net	251	816
Fees from covered call options	1,639	3,123
Gain on bargain purchases, net	0	840
Trading (losses) gains, net	(435)	146
Other	6,158	6,955
Total non-interest income	57,379	47,023
Non-interest expense
Salaries and employee benefits	77,513	69,030
Equipment	6,184	5,400
Occupancy, net	8,853	8,062
Data processing	4,599	3,618
Advertising and marketing	2,040	2,006
Professional fees	3,221	3,604
Amortization of other intangible assets	1,120	1,049
FDIC insurance	3,444	3,357
OREO (income) expenses, net	(1,620)	7,178
Other	14,765	14,455
Total non-interest expense	120,119	117,759
Income before taxes	52,286	37,759
Income tax expense	20,234	14,549
Net income	32,052	23,210
Preferred stock dividends and discount accretion	2,616	1,246
Net income applicable to common shares	$ 29,436	$ 21,964
Net income per common share-Basic	$ 0.80	$ 0.61
Net income per common share-Diluted	$ 0.65	$ 0.50
Cash dividends declared per common share	$ 0.09	$ 0.09
Weighted average common shares outstanding	36,976	36,207
Dilutive potential common shares	12,463	7,530
Average common shares and dilutive common shares	49,439	43,737