Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and due from banks (noninterest-bearing)	$ 327,706	$ 277,751
Federal funds sold and securities purchased under reverse repurchase agreements	500	250
Securities available for sale (at fair value)	2,356,682	2,345,422
Securities held to maturity (fair value: $1,157,046-2016; $1,195,367-2015)	1,158,643	1,187,818
Loans held for sale (LHFS)	175,927	160,189
Loans held for investment (LHFI)	7,851,213	7,091,385
Less allowance for loan losses, LHFI	71,265	67,619
Net LHFI	7,779,948	7,023,766
Acquired loans:
Noncovered loans	268,633	372,711
Covered loans	3,614	17,700
Less allowance for loan losses, acquired loans	11,397	11,992
Net acquired loans	260,850	378,419
Net LHFI and acquired loans	8,040,798	7,402,185
Premises and equipment, net	184,987	195,656
Mortgage servicing rights	80,239	74,007
Goodwill	366,156	366,156
Identifiable intangible assets	20,680	27,546
Other real estate, excluding covered other real estate	62,051	77,177
Covered other real estate	0	1,651
FDIC indemnification asset	0	738
Other assets	577,964	562,350
Total Assets	13,352,333	12,678,896
Deposits:
Noninterest-bearing	2,973,238	2,998,694
Interest-bearing	7,082,774	6,589,536
Total deposits	10,056,012	9,588,230
Federal funds purchased and securities sold under repurchase agreements	539,817	441,042
Short-term borrowings	769,778	412,617
Long-term FHLB advances	251,049	501,155
Subordinated notes	0	49,969
Junior subordinated debt securities	61,856	61,856
Other liabilities	153,613	150,970
Total Liabilities	11,832,125	11,205,839
Shareholders' Equity
Common stock, no par value: Authorized: 250,000,000 shares Issued and outstanding: 67,628,618 shares - 2016; 67,559,128 shares - 2015	14,091	14,076
Capital surplus	366,563	361,467
Retained earnings	1,185,352	1,142,908
Accumulated other comprehensive loss, net of tax	(45,798)	(45,394)
Total Shareholders' Equity	1,520,208	1,473,057
Total Liabilities and Shareholders' Equity	$ 13,352,333	$ 12,678,896