Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and due from banks	$ 134,202	$ 152,265
Interest bearing deposits	403,468	445,954
Temporary investments	651	547
Total cash and cash equivalents	538,321	598,766
Investment securities
Trading, at fair value	3,156	2,309
Available for sale, at fair value	3,095,009	3,168,578
Held to maturity, at amortized cost	4,625	4,714
Loans held for sale	127,117	98,691
Non-covered loans and leases	5,941,270	5,888,098
Allowance for non-covered loan and lease losses	(86,670)	(92,968)
Non-covered loans and leases, net	5,854,600	5,795,130
Covered loans and leases, net of allowance of $12,635 and $14,320	593,179	622,451
Restricted equity securities	32,453	32,581
Premises and equipment, net	153,557	152,366
Goodwill and other intangible assets, net	676,010	677,224
Mortgage servicing rights, at fair value	20,210	18,184
Non-covered other real estate owned	34,306	34,175
Covered other real estate owned	12,787	19,491
FDIC indemnification asset	78,417	91,089
Other assets	229,431	247,606
Total assets	11,453,178	11,563,355
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest bearing	1,994,995	1,913,121
Interest bearing	7,120,170	7,323,569
Total deposits	9,115,165	9,236,690
Securities sold under agreements to repurchase	126,645	124,605
Term debt	255,160	255,676
Junior subordinated debentures, at fair value	83,453	82,905
Junior subordinated debentures, at amortized cost	102,463	102,544
Other liabilities	83,240	88,522
Total liabilities	9,766,126	9,890,942
COMMITMENTS AND CONTINGENCIES (NOTE 9)
SHAREHOLDERS' EQUITY
Common stock, no par value, 200,000,000 shares authorized; issued and outstanding: 111,892,969 in 2012 and 112,164,891 in 2011	1,510,774	1,514,913
Retained earnings	141,339	123,726
Accumulated other comprehensive income	34,939	33,774
Total shareholders' equity	1,687,052	1,672,413
Total liabilities and shareholders' equity	$ 11,453,178	$ 11,563,355