CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks	$ 168,376	$ 126,882
Due from banks - interest-bearing	76,438	142,807
Federal funds sold	0	165,000
Securities available-for-sale - cost $7,445,999 and $5,658,120 at December 31, 2011 and December 31, 2010, respectively:
Securities pledged as collateral	37,861	8,697
Held in portfolio	7,534,040	5,711,978
Securities held-to-maturity - fair value $473,903 at December 31, 2011	467,680	0
Trading securities	61,975	255,397
Loans and leases, excluding covered loans	12,309,385	11,386,628
Less: Allowance for loan and lease losses	262,557	257,007
Loans and leases, excluding covered loans, net	12,046,828	11,129,621
Covered loans, net of allowance for loan losses	1,417,289	1,790,133
Net loans and leases	13,464,117	12,919,754
Premises and equipment, net	143,641	128,426
Deferred tax asset	155,529	105,398
Goodwill	486,383	486,070
Customer-relationship intangibles, net	36,370	42,564
Affordable housing investments	121,039	99,670
Customers' acceptance liability	1,702	1,715
Other real estate owned ($98,550 and $120,866 covered by FDIC loss share at December 31, 2011 and December 31, 2010, respectively)	129,340	178,183
FDIC indemnification asset	204,259	295,466
Other assets	577,541	685,111
Total assets	23,666,291	21,353,118
Liabilities
Demand deposits	11,146,627	8,457,178
Interest checking deposits	2,034,815	1,863,004
Money market deposits	5,954,886	6,344,749
Savings deposits	339,858	291,299
Time deposits-under $100,000	251,782	338,112
Time deposits-$100,000 and over	659,614	882,520
Total deposits	20,387,582	18,176,862
Short-term borrowings	50,000	153,444
Long-term debt	697,778	704,971
Reserve for off-balance sheet credit commitments	23,097	21,529
Acceptances outstanding	1,702	1,715
Other liabilities	316,640	264,203
Total liabilities	21,476,799	19,322,724
Redeemable noncontrolling interest	44,643	45,676
Commitments and contingencies
Equity
Common stock, par value $1.00 per share; 75,000,000 shares authorized; 53,885,886 shares issued at December 31, 2011 and December 31, 2010	53,886	53,886
Additional paid-in capital	489,200	487,868
Accumulated other comprehensive income	72,372	36,853
Retained earnings	1,611,969	1,482,037
Treasury shares, at cost - 1,386,705 and 1,639,203 shares at December 31, 2011 and December 31, 2010, respectively	(82,578)	(101,065)
Total shareholders' equity	2,144,849	1,959,579
Noncontrolling interest	0	25,139
Total equity	2,144,849	1,984,718
Total liabilities and equity	$ 23,666,291	$ 21,353,118