CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 235,038	$ 168,376
Due from banks - interest-bearing	335,300	76,438
Federal funds sold	19,500
Securities available-for-sale - cost $7,710,762 and $7,445,999 at September 30, 2012 and December 31, 2011, respectively:
Securities pledged as collateral	50,820	37,861
Held in portfolio	7,821,244	7,534,040
Securities held-to-maturity - fair value $1,222,721 and $473,903 at September 30, 2012 and December 31, 2011, respectively	1,174,161	467,680
Trading securities	64,749	61,975
Loans and leases, excluding covered loans	13,724,651	12,309,385
Less: Allowance for loan and lease losses	268,440	262,557
Loans and leases, excluding covered loans, net	13,456,211	12,046,828
Covered loans, net of allowance for loan losses	1,099,359	1,417,289
Net loans and leases	14,555,570	13,464,117
Premises and equipment, net	147,621	143,641
Deferred tax asset	139,829	155,529
Goodwill	641,694	486,383
Customer-relationship intangibles, net	50,071	36,370
Affordable housing investments	156,982	121,039
Customers' acceptance liability	2,573	1,702
Other real estate owned ($83,618 and $98,550 covered by FDIC loss share at September 30, 2012 and December 31, 2011, respectively)	110,673	129,340
FDIC indemnification asset	160,991	204,259
Other assets	584,712	577,541
Total assets	26,251,528	23,666,291
Liabilities
Demand deposits	13,432,413	11,146,627
Interest checking deposits	1,979,580	2,034,815
Money market deposits	5,826,708	5,954,886
Savings deposits	374,197	339,858
Time deposits-under $100,000	214,620	251,782
Time deposits-$100,000 and over	684,798	659,614
Total deposits	22,512,316	20,387,582
Short-term borrowings	211,739	50,000
Long-term debt	706,035	697,778
Reserve for off-balance sheet credit commitments	25,260	23,097
Acceptances outstanding	2,573	1,702
Other liabilities	421,895	316,640
Total liabilities	23,879,818	21,476,799
Redeemable noncontrolling interest	41,386	44,643
Commitments and contingencies
Shareholders' Equity
Common stock, par value $1.00 per share; 75,000,000 shares authorized; 53,885,886 shares issued at September 30, 2012 and December 31, 2011	53,886	53,886
Additional paid-in capital	485,975	489,200
Accumulated other comprehensive income	93,924	72,372
Retained earnings	1,732,417	1,611,969
Treasury shares, at cost - 695,872 and 1,386,705 shares at September 30, 2012 and December 31, 2011, respectively	(35,878)	(82,578)
Total shareholders' equity	2,330,324	2,144,849
Total liabilities and shareholders' equity	$ 26,251,528	$ 23,666,291