CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and due from banks	$ 162,893	$ 168,376
Due from banks - interest-bearing	106,109	76,438
Federal funds sold	162,000
Securities available-for-sale - cost $6,723,761 and $7,445,999 at June 30, 2012 and December 31, 2011, respectively:
Securities pledged as collateral	42,789	37,861
Held in portfolio	6,823,092	7,534,040
Securities held-to-maturity - fair value $1,127,053 and $473,903 at June 30, 2012 and December 31, 2011, respectively	1,100,229	467,680
Trading securities	62,585	61,975
Loans and leases, excluding covered loans	13,507,209	12,309,385
Less: Allowance for loan and lease losses	269,534	262,557
Loans and leases, excluding covered loans, net	13,237,675	12,046,828
Covered loans, net of allowance for loan losses	1,216,988	1,417,289
Net loans and leases	14,454,663	13,464,117
Premises and equipment, net	147,245	143,641
Deferred tax asset	147,503	155,529
Goodwill	556,149	486,383
Customer-relationship intangibles, net	32,965	36,370
Affordable housing investments	145,582	121,039
Customers' acceptance liability	1,746	1,702
Other real estate owned ($82,834 and $98,550 covered by FDIC loss share at June 30, 2012 and December 31, 2011, respectively)	117,501	129,340
FDIC indemnification asset	170,654	204,259
Other assets	568,268	577,541
Total assets	24,801,973	23,666,291
Liabilities
Demand deposits	12,187,075	11,146,627
Interest checking deposits	1,849,588	2,034,815
Money market deposits	5,714,258	5,954,886
Savings deposits	368,544	339,858
Time deposits-under $100,000	222,368	251,782
Time deposits-$100,000 and over	767,219	659,614
Total deposits	21,109,052	20,387,582
Short-term borrowings	322,077	50,000
Long-term debt	712,280	697,778
Reserve for off-balance sheet credit commitments	24,351	23,097
Acceptances outstanding	1,746	1,702
Other liabilities	335,203	316,640
Total liabilities	22,504,709	21,476,799
Redeemable noncontrolling interest	41,899	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 June 30, 2012 and December 31, 2011	53,886	53,886
Additional paid-in capital	491,439	489,200
Accumulated other comprehensive income	82,807	72,372
Retained earnings	1,686,163	1,611,969
Treasury shares, at cost - 1,063,534 and 1,386,705 shares at June 30, 2012 and December 31, 2011, respectively	(58,930)	(82,578)
Total shareholders' equity	2,255,365	2,144,849
Total liabilities and shareholders' equity	$ 24,801,973	$ 23,666,291