CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 183,227	$ 151,969
Due from banks - interest-bearing	552,719	246,336
Federal funds sold and securities purchased under resale agreements	200,000	17,100
Securities available-for-sale - cost $6,267,691 and $9,057,238 at December 31, 2013 and December 31, 2012, respectively:
Securities pledged as collateral	12,376	48,697
Held in portfolio	6,228,741	9,157,292
Securities held-to-maturity - fair value $2,883,935 and $1,446,599 at December 31, 2013 and December 31, 2012, respectively	2,957,843	1,398,403
Trading securities	82,357	115,059
Loans and leases, excluding covered loans	17,170,438	14,818,295
Less: Allowance for loan and lease losses	302,584	277,888
Loans and leases, excluding covered loans, net	16,867,854	14,540,407
Covered loans, net of allowance for loan losses	700,989	986,223
Net loans and leases	17,568,843	15,526,630
Premises and equipment, net	198,398	149,433
Deferred tax asset	217,990	124,461
Goodwill	642,622	642,622
Customer-relationship intangibles, net	40,621	48,139
Affordable housing investments	188,207	154,011
Customers' acceptance liability	10,521	7,859
Other real estate owned ($25,481 and $58,276 covered by FDIC loss share at December 31, 2013 and December 31, 2012, respectively)	38,092	79,303
FDIC indemnification asset	89,227	150,018
Other assets	506,167	601,160
Total assets	29,717,951	28,618,492
Liabilities
Demand deposits	16,058,968	14,264,797
Interest checking deposits	2,467,890	2,459,972
Money market deposits	6,022,457	5,610,844
Savings deposits	441,521	398,824
Time deposits-under $100,000	176,488	203,422
Time deposits-$100,000 and over	512,113	564,496
Total deposits	25,679,437	23,502,355
Short-term borrowings	3,889	1,423,798
Long-term debt	735,968	706,051
Reserve for off-balance sheet credit commitments	33,944	24,837
Acceptances outstanding	10,521	7,859
Other liabilities	473,438	407,162
Total liabilities	26,937,197	26,072,062
Redeemable noncontrolling interest	39,768	41,112
Commitments and contingencies
Shareholders' Equity
Preferred stock, par value $1.00 per share; 5,000,000 shares authorized; 275,000 and 175,000 shares issued at December 31, 2013 and December 31, 2012	267,616	169,920
Common stock, par value $1.00 per share; 75,000,000 shares authorized; 54,667,295 and 53,885,886 shares issued at December 31, 2013 and December 31, 2012	54,667	53,886
Additional paid-in capital	541,210	490,339
Accumulated other comprehensive (loss) income	(15,641)	86,582
Retained earnings	1,918,163	1,738,957
Treasury shares, at cost - 483,523 and 669,454 shares at December 31, 2013 and December 31, 2012, respectively	(25,029)	(34,366)
Total common shareholders' equity	2,473,370	2,335,398
Total shareholders' equity	2,740,986	2,505,318
Total liabilities and shareholders' equity	$ 29,717,951	$ 28,618,492