Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
ASSETS
Cash and due from banks	$ 143,409	$ 223,532
Interest bearing deposits	659,817	315,053
Temporary investments	1,768	5,202
Total cash and cash equivalents	804,994	543,787
Investment securities
Trading, at fair value	3,863	3,747
Available for sale, at fair value	2,083,755	2,625,229
Held to maturity, at amortized cost	3,741	4,541
Loans held for sale, at fair value	173,994	320,132
Non-covered loans and leases	6,787,117	6,681,080
Allowance for non-covered loan and lease losses	(85,836)	(85,391)
Net non-covered loans and leases	6,701,281	6,595,689
Covered loans and leases, net of allowance of $14,367 and $18,275	419,059	477,078
Restricted equity securities	32,112	33,443
Premises and equipment, net	170,145	162,667
Goodwill and other intangible assets, net	682,971	685,331
Mortgage servicing rights, at fair value	38,192	27,428
Non-covered other real estate owned	13,235	17,138
Covered other real estate owned	3,484	10,374
FDIC indemnification asset	36,263	52,798
Other assets	225,119	236,061
Total assets	11,392,208	11,795,443
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest bearing	2,218,536	2,278,914
Interest bearing	6,737,789	7,100,361
Total deposits	8,956,325	9,379,275
Securities sold under agreements to repurchase	176,447	137,075
Term debt	252,543	253,605
Junior subordinated debentures, at fair value	86,159	85,081
Junior subordinated debentures, at amortized cost	102,060	110,985
Other liabilities	103,322	105,383
Total liabilities	9,676,856	10,071,404
COMMITMENTS AND CONTINGENCIES (NOTE 10)
SHAREHOLDERS' EQUITY
Common stock, no par value, 200,000,000 shares authorized; issued and outstanding: 111,898,620 in 2013 and 111,889,959 in 2012	1,512,657	1,512,400
Retained earnings	203,058	187,293
Accumulated other comprehensive income	(363)	24,346
Total shareholders' equity	1,715,352	1,724,039
Total liabilities and shareholders' equity	$ 11,392,208	$ 11,795,443