Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2011
Assets
Cash and due from banks	$ 596,590		$ 976,191		$ 953,688
Funds sold and resell agreements	18,904		10,174		19,193
Trading securities	204,242		76,800		109,659
Investment securities	432,114	[1]	439,236	[2]	452,652	[3]
Available for sale securities	11,506,434		10,179,365		9,619,631
Fair value option securities	331,887		651,226		672,191
Residential mortgage loans held for sale	325,102		188,125		256,397
Loans	11,832,367		11,269,743		11,124,569
Less allowance for loan losses	(233,756)		(253,481)		(271,456)
Loans, net of allowance	11,598,611		11,016,262		10,853,113
Premises and equipment, net	259,195		262,735		264,325
Receivables	116,243		123,257		111,427
Goodwill	358,962		335,601		335,601
Intangible assets, net	33,196		10,219		11,115
Mortgage servicing rights, net	89,653		86,783		87,948
Real estate and other repossessed assets	104,128		122,753		127,943
Bankers' acceptances	1,605		1,881		211
Derivative contracts	435,653		293,859		370,616
Cash surrender value of bank-owned life insurance	271,830		263,318		260,506
Receivable on unsettled securities trades	32,480		75,151		172,641
Other assets	400,812		381,010		387,408
Total assets	27,117,641		25,493,946		25,066,265
Noninterest-bearing demand deposits	6,848,401		5,799,785		5,414,284
Interest-bearing deposits:
Transaction	9,002,567		9,354,456		9,252,837
Savings	269,573		226,357		217,431
Time	3,022,326		3,381,982		3,554,470
Total deposits	19,142,867		18,762,580		18,439,022
Funds purchased	1,680,626		1,063,318		1,318,668
Repurchase agreements	1,109,696		1,233,064		1,206,793
Other borrowings	639,254		74,485		80,276
Subordinated debentures	347,592		398,881		398,834
Accrued interest, taxes and expense	182,410		149,508		155,188
Bankers' acceptances	1,605		1,881		211
Derivative contracts	254,422		653,371		341,822
Due on unsettled securities trades	556,998		236,522		218,097
Other liabilities	189,696		133,684		139,804
Total liabilities	24,105,166		22,707,294		22,298,715
Shareholders' equity:
Common stock	4		4		4
Capital surplus	849,390		818,817		799,272
Retained earnings	2,148,292		1,953,332		1,908,574
Treasury stock	(184,422)		(150,664)		(138,829)
Accumulated other comprehensive income	162,393		128,979		163,571
Total shareholders' equity	2,975,657		2,750,468		2,732,592
Non-controlling interest	36,818		36,184		34,958
Total equity	3,012,475		2,786,652		2,767,550
Total liabilities and equity	$ 27,117,641		$ 25,493,946		$ 25,066,265

[1] Carrying value includes $6.2 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.

[2] Carrying value includes $12 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.

[3] Carrying value includes $13 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.