Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and due from banks (noninterest-bearing)	$ 301,532	$ 231,489
Federal funds sold and securities purchased under reverse repurchase agreements	7,869	7,046
Securities available for sale (at fair value)	3,511,683	2,657,745
Securities held to maturity (fair value: $71,933-2013; $46,888-2012)	70,338	42,188
Loans held for sale (LHFS)	202,699	257,986
Loans held for investment (LHFI)	5,577,382	5,592,754
Less allowance for loan losses, LHFI	72,825	78,738
Net LHFI	5,504,557	5,514,016
Acquired loans:
Noncovered loans	922,453	81,523
Covered loans	40,820	52,041
Less allowance for loan losses, acquired loans	2,690	6,075
Net acquired loans	960,583	127,489
Net LHFI and acquired loans	6,465,140	5,641,505
Premises and equipment, net	210,845	154,841
Mortgage servicing rights	60,380	47,341
Goodwill	368,315	291,104
Identifiable intangible assets	46,889	17,306
Other real estate, excluding covered other real estate	117,712	78,189
Covered other real estate	5,147	5,741
FDIC indemnification asset	17,342	21,774
Other assets	477,421	374,412
Total Assets	11,863,312	9,828,667
Deposits:
Noninterest-bearing	2,520,895	2,254,211
Interest-bearing	7,296,697	5,642,306
Total deposits	9,817,592	7,896,517
Federal funds purchased and securities sold under repurchase agreements	374,021	288,829
Short-term borrowings	56,645	86,920
Long-term FHLB advances	8,679	0
Subordinated notes	49,888	49,871
Junior subordinated debt securities	61,856	61,856
Other liabilities	167,812	157,305
Total Liabilities	10,536,493	8,541,298
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 67,163,195 shares - 2013; 64,820,414 shares - 2012	13,994	13,506
Capital surplus	342,359	285,905
Retained earnings	1,006,554	984,563
Accumulated other comprehensive (loss) income, net of tax	(36,088)	3,395
Total Shareholders' Equity	1,326,819	1,287,369
Total Liabilities and Shareholders' Equity	$ 11,863,312	$ 9,828,667