Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks (noninterest-bearing)	$ 228,498	$ 277,751
Federal funds sold and securities purchased under reverse repurchase agreements	0	250
Securities available for sale (at fair value)	2,368,120	2,345,422
Securities held to maturity (fair value: $1,199,213-2016; $1,195,367-2015)	1,168,203	1,187,818
Loans held for sale (LHFS)	191,028	160,189
Loans held for investment (LHFI)	7,268,022	7,091,385
Less allowance for loan losses, LHFI	69,668	67,619
Net LHFI	7,198,354	7,023,766
Acquired loans:
Noncovered loans	349,781	372,711
Covered loans	14,974	17,700
Less allowance for loan losses, acquired loans	13,535	11,992
Net acquired loans	351,220	378,419
Net LHFI and acquired loans	7,549,574	7,402,185
Premises and equipment, net	194,453	195,656
Mortgage servicing rights	68,208	74,007
Goodwill	366,156	366,156
Identifiable intangible assets	25,751	27,546
Other real estate, excluding covered other real estate	71,806	77,177
Covered other real estate	496	1,651
FDIC indemnification asset	506	738
Other assets	542,397	562,350
Total Assets	12,775,196	12,678,896
Deposits:
Noninterest-bearing	2,874,306	2,998,694
Interest-bearing	6,759,337	6,589,536
Total deposits	9,633,643	9,588,230
Federal funds purchased and securities sold under repurchase agreements	466,436	441,042
Short-term borrowings	411,385	412,617
Long-term FHLB advances	501,124	501,155
Subordinated notes	49,977	49,969
Junior subordinated debt securities	61,856	61,856
Other liabilities	142,519	150,970
Total Liabilities	11,266,940	11,205,839
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 67,639,832 shares - 2016; 67,559,128 shares - 2015	14,093	14,076
Capital surplus	363,979	361,467
Retained earnings	1,151,757	1,142,908
Accumulated other comprehensive loss, net of tax	(21,573)	(45,394)
Total Shareholders' Equity	1,508,256	1,473,057
Total Liabilities and Shareholders' Equity	$ 12,775,196	$ 12,678,896