Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash and due from banks (noninterest-bearing)	$ 335,695	$ 231,489
Federal funds sold and securities purchased under reverse repurchase agreements	7,867	7,046
Securities available for sale (at fair value)	3,372,101	2,657,745
Securities held to maturity (fair value: $70,949-2013; $46,888-2012)	69,980	42,188
Loans held for sale (LHFS)	119,986	257,986
Loans held for investment (LHFI)	5,696,641	5,592,754
Less allowance for loan losses, LHFI	68,632	78,738
Net LHFI	5,628,009	5,514,016
Acquired loans:
Noncovered loans	837,875	81,523
Covered loans	37,250	52,041
Less allowance for loan losses, acquired loans	5,333	6,075
Net acquired loans	869,792	127,489
Net LHFI and acquired loans	6,497,801	5,641,505
Premises and equipment, net	208,837	154,841
Mortgage servicing rights	63,150	47,341
Goodwill	372,463	291,104
Identifiable intangible assets	44,424	17,306
Other real estate, excluding covered other real estate	116,329	78,189
Covered other real estate	5,092	5,741
FDIC indemnification asset	17,085	21,774
Other assets	574,387	374,412
Total Assets	11,805,197	9,828,667
Deposits:
Noninterest-bearing	2,643,612	2,254,211
Interest-bearing	7,143,622	5,642,306
Total deposits	9,787,234	7,896,517
Federal funds purchased and securities sold under repurchase agreements	342,465	288,829
Short-term borrowings	60,698	86,920
Long-term FHLB advances	8,562	0
Subordinated notes	49,896	49,871
Junior subordinated debt securities	61,856	61,856
Other liabilities	164,972	157,305
Total Liabilities	10,475,683	8,541,298
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 67,181,694 shares - 2013; 64,820,414 shares - 2012	13,998	13,506
Capital surplus	343,759	285,905
Retained earnings	1,023,983	984,563
Accumulated other comprehensive (loss) income, net of tax	(52,226)	3,395
Total Shareholders' Equity	1,329,514	1,287,369
Total Liabilities and Shareholders' Equity	$ 11,805,197	$ 9,828,667