Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Interest income
Interest and fees on loans	$ 143,555	$ 136,543
Interest bearing deposits with banks	248	936
Federal funds sold and securities purchased under resale agreements	12	32
Securities	11,847	9,540
Trading account securities	9	13
Federal Home Loan Bank and Federal Reserve Bank stock	604	550
Brokerage customer receivables	211	166
Total interest income	156,486	147,780
Interest expense
Interest on deposits	18,030	23,956
Interest on Federal Home Loan Bank advances	3,584	3,958
Interest on notes payable and other borrowings	3,102	2,630
Interest on secured borrowings - owed to securitization investors	2,549	3,040
Interest on subordinated notes	169	212
Interest on junior subordinated debentures	3,157	4,370
Total interest expense	30,591	38,166
Net interest income	125,895	109,614
Provision for credit losses	17,400	25,344
Net interest income after provision for credit losses	108,495	84,270
Non-interest income
Wealth management	12,401	10,236
Mortgage banking	18,534	11,631
Service charges on deposit accounts	4,208	3,311
Gains on available-for-sale securities, net	816	106
Gain on bargain purchases	840	9,838
Trading gains (losses)	146	(440)
Other	10,078	6,205
Total non-interest income	47,023	40,887
Non-interest expense
Salaries and employee benefits	69,030	56,099
Equipment	5,400	4,264
Occupancy, net	8,062	6,505
Data processing	3,618	3,523
Advertising and marketing	2,006	1,614
Professional fees	3,604	3,546
Amortization of other intangible assets	1,049	689
FDIC insurance	3,357	4,518
OREO expenses, net	7,178	5,808
Other	14,455	11,543
Total non-interest expense	117,759	98,109
Income before taxes	37,759	27,048
Income tax expense	14,549	10,646
Net income	23,210	16,402
Preferred stock dividends and discount accretion	1,246	1,031
Net income applicable to common shares	$ 21,964	$ 15,371
Net income per common share - Basic	$ 0.61	$ 0.44
Net income per common share - Diluted	$ 0.50	$ 0.36
Cash dividends declared per common share	$ 0.09	$ 0.09
Weighted average common shares outstanding	36,207	34,928
Dilutive potential common shares	7,530	7,794
Average common shares and dilutive common shares	43,737	42,722