Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks (noninterest-bearing)	$ 202,625	$ 161,544
Federal funds sold and securities purchased under reverse repurchase agreements	9,258	11,773
Securities available for sale (at fair value)	2,468,993	2,177,249
Securities held to maturity (fair value: $62,515-2011; $145,143-2010)	57,705	140,847
Loans held for sale (LHFS)	216,553	153,044
Loans held for investment (LHFI), excluding covered loans	5,857,484	6,060,242
Less allowance for loan losses, excluding covered loans	89,518	93,510
Net LHFI, excluding covered loans	5,767,966	5,966,732
Covered loans	76,804	0
Allowance for loan losses, covered loans	502	0
Net covered loans	76,302	0
Net LHFI and covered loans	5,844,268	5,966,732
Premises and equipment, net	142,582	142,289
Mortgage servicing rights	43,274	51,151
Goodwill	291,104	291,104
Identifiable intangible assets	14,076	16,306
Other real estate, excluding covered other real estate	79,053	86,704
Covered other real estate	6,331	0
FDIC indemnification asset	28,348	0
Other assets	322,837	355,159
Total Assets	9,727,007	9,553,902
Liabilities
Noninterest-bearing	2,033,442	1,636,625
Interest-bearing	5,532,921	5,407,942
Total deposits	7,566,363	7,044,567
Federal funds purchased and securities sold under repurchase agreements	604,500	700,138
Short-term borrowings	87,628	425,343
Subordinated notes	49,839	49,806
Junior subordinated debt securities	61,856	61,856
Other liabilities	141,784	122,708
Total Liabilities	8,511,970	8,404,418
Commitments and Contingencies
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 64,142,498 shares - 2011;63,917,591 shares - 2010	13,364	13,318
Capital surplus	266,026	256,675
Retained earnings	932,526	890,917
Accumulated other comprehensive income (loss), net of tax	3,121	(11,426)
Total Shareholders' Equity	1,215,037	1,149,484
Total Liabilities and Shareholders' Equity	$ 9,727,007	$ 9,553,902