CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 151,969	$ 168,376
Due from banks - interest-bearing	246,336	76,438
Federal funds sold	17,100
Securities available-for-sale - cost $9,057,238 and $7,445,999 at December 31, 2012 and December 31, 2011, respectively:
Securities pledged as collateral	48,697	37,861
Held in portfolio	9,157,292	7,534,040
Securities held-to-maturity - fair value $1,446,599 and $473,903 at December 31, 2012 and December 31, 2011, respectively	1,398,403	467,680
Trading securities	115,059	61,975
Loans and leases, excluding covered loans	14,818,295	12,309,385
Less: Allowance for loan and lease losses	277,888	262,557
Loans and leases, excluding covered loans, net	14,540,407	12,046,828
Covered loans, net of allowance for loan losses	986,223	1,417,289
Net loans and leases	15,526,630	13,464,117
Premises and equipment, net	149,433	143,641
Deferred tax asset	124,461	155,529
Goodwill	642,622	486,383
Customer-relationship intangibles, net	48,139	36,370
Affordable housing investments	154,011	121,039
Customers' acceptance liability	7,859	1,702
Other real estate owned ($58,276 and $98,550 covered by FDIC loss share at December 31, 2012 and December 31, 2011, respectively)	79,303	129,340
FDIC indemnification asset	150,018	204,259
Other assets	601,160	577,541
Total assets	28,618,492	23,666,291
Liabilities
Demand deposits	14,264,797	11,146,627
Interest checking deposits	2,459,972	2,034,815
Money market deposits	5,610,844	5,954,886
Savings deposits	398,824	339,858
Time deposits-under $100,000	203,422	251,782
Time deposits-$100,000 and over	564,496	659,614
Total deposits	23,502,355	20,387,582
Short-term borrowings	1,423,798	50,000
Long-term debt	706,051	697,778
Reserve for off-balance sheet credit commitments	24,837	23,097
Acceptances outstanding	7,859	1,702
Other liabilities	407,162	316,640
Total liabilities	26,072,062	21,476,799
Redeemable noncontrolling interest	41,112	44,643
Commitments and contingencies
Shareholders' Equity
Preferred stock, par value $1.00 per share; 5,000,000 shares authorized; 175,000 shares issued at December 31, 2012	169,920
Common stock, par value $1.00 per share; 75,000,000 shares authorized; 53,885,886 shares issued at December 31, 2012 and December 31, 2011	53,886	53,886
Additional paid-in capital	490,339	489,200
Accumulated other comprehensive income	86,582	72,372
Retained earnings	1,738,957	1,611,969
Treasury shares, at cost - 669,454 and 1,386,705 shares at December 31, 2012 and December 31, 2011, respectively	(34,366)	(82,578)
Total common shareholders' equity	2,335,398	2,144,849
Total shareholders' equity	2,505,318	2,144,849
Total liabilities and shareholders' equity	$ 28,618,492	$ 23,666,291