Consolidated Statements Of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Interest income
Interest and fees on loans	$ 147,030	$ 142,114
Interest bearing deposits with banks	249	569
Federal funds sold and securities purchased under resale agreements	4	15
Securities	13,114	8,752
Trading account securities	9	5
Federal Home Loan Bank and Federal Reserve Bank stock	711	684
Brokerage customer receivables	209	174
Total interest income	161,326	152,313
Interest expense
Interest on deposits	11,923	14,504
Interest on Federal Home Loan Bank advances	2,643	2,764
Interest on notes payable and other borrowings	750	1,154
Interest on subordinated notes	0	59
Interest on junior subordinated debentures	2,004	3,119
Total interest expense	17,320	21,600
Net interest income	144,006	130,713
Provision for credit losses	1,880	15,687
Net interest income after provision for credit losses	142,126	115,026
Non-interest income
Wealth management	16,813	14,828
Mortgage banking	16,428	30,145
Service charges on deposit accounts	5,346	4,793
(Losses) gains on available-for-sale securities, net	(33)	251
Fees from covered call options	1,542	1,639
Trading losses, net	(652)	(435)
Other	6,085	6,158
Total non-interest income	45,529	57,379
Non-interest expense
Salaries and employee benefits	79,934	77,513
Equipment	7,403	6,184
Occupancy, net	10,993	8,853
Data processing	4,715	4,599
Advertising and marketing	2,816	2,040
Professional fees	3,454	3,221
Amortization of other intangible assets	1,163	1,120
FDIC insurance	2,951	3,444
OREO expense (income), net	3,976	(1,620)
Other	13,910	14,765
Total non-interest expense	131,315	120,119
Income before taxes	56,340	52,286
Income tax expense	21,840	20,234
Net income	34,500	32,052
Preferred stock dividends and discount accretion	1,581	2,616
Net income applicable to common shares	$ 32,919	$ 29,436
Net income per common share-Basic (in usd per share)	$ 0.71	$ 0.80
Net income per common share-Diluted (in usd per share)	$ 0.68	$ 0.65
Cash dividends declared per common share	$ 0.10	$ 0.09
Weighted average common shares outstanding	46,195	36,976
Dilutive potential common shares	4,509	12,463
Average common shares and dilutive common shares	50,704	49,439