Consolidated Statements Of Condition (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 284,731	$ 148,012
Federal funds sold and securities purchased under resale agreements	30,297	21,692
Interest-bearing deposits with other banks (no balance restricted for securitization investors at December 31, 2012, and a balance restrictred for securitization investors of $272,592 at December 31, 2011)	1,035,743	749,287
Available-for-sale securities, at fair value	1,796,076	1,291,797
Trading account securities	583	2,490
Federal Home Loan Bank and Federal Reserve Bank stock	79,564	100,434
Brokerage customer receivables	24,864	27,925
Mortgage loans held-for-sale, at fair value	385,033	306,838
Mortgage loans held-for-sale, at lower of cost or market	27,167	13,686
Loans, net of unearned income, excluding covered loans	11,828,943	10,521,377
Covered loans	560,087	651,368
Total loans	12,389,030	11,172,745
Less: Allowance for loan losses	107,351	110,381
Less: Allowance for covered loan losses	13,454	12,977
Net loans (no balance restricted for securitization investors at December 31, 2012, and a balance restricted for securitization investors of $411,532 at December 31, 2011)	12,268,225	11,049,387
Premises and equipment, net	501,205	431,512
FDIC indemnification asset	208,160	344,251
Accrued interest receivable and other assets	511,617	444,912
Trade date securities receivable	0	634,047
Goodwill	345,401	305,468
Other intangible assets	20,947	22,070
Total assets	17,519,613	15,893,808
Deposits:
Non-interest bearing	2,396,264	1,785,433
Interest bearing	12,032,280	10,521,834
Total deposits	14,428,544	12,307,267
Notes payable	2,093	52,822
Federal Home Loan Bank advances	414,122	474,481
Other borrowings	274,411	443,753
Secured borrowings - owed to securitization investors	0	600,000
Subordinated notes	15,000	35,000
Junior subordinated debentures	249,493	249,493
Accrued interest payable and other liabilities	331,245	187,459
Total liabilities	15,714,908	14,350,275
Shareholders' Equity:
Common stock, no par value; $1.00 stated value; 100,000,000 shares and 60,000,000 shares authorized at December 31, 2012 and 2011, respectively; 37,107,684 shares and 35,981,950 shares issued at December 31, 2012 and 2011, respectively	37,108	35,982
Surplus	1,036,295	1,001,316
Treasury stock, at cost, 249,329 shares and 3,601 shares at December 31, 2012 and 2011, respectively	(7,838)	(112)
Retained earnings	555,023	459,457
Accumulated other comprehensive income (loss)	7,711	(2,878)
Total shareholders' equity	1,804,705	1,543,533
Total liabilities and shareholders' equity	17,519,613	15,893,808
Series A Preferred Stock [Member]
Shareholders' Equity:
Series A - $1,000 liquidation value; 50,000 shares issued and outstanding at December 31, 2012 and December 31, 2011	49,906	49,768
Series C Preferred Stock [Member]
Shareholders' Equity:
Series A - $1,000 liquidation value; 50,000 shares issued and outstanding at December 31, 2012 and December 31, 2011	$ 126,500	$ 0