Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 132,595	$ 147,894
Federal funds sold	563	543
Interest bearing deposits in banks	647,299	650,233
Total cash and cash equivalents	780,457	798,670
Investment securities:
Available-for-sale	1,456,840	1,711,924
Held-to-maturity (estimated fair values of $607,550 and $584,533 at December 31, 2015 and 2014, respectively)	600,665	575,186
Total investment securities	2,057,505	2,287,110
Loans held for investment	5,193,321	4,856,615
Mortgage loans held for sale	52,875	40,828
Total loans	5,246,196	4,897,443
Less allowance for loan losses	76,817	74,200
Net loans	5,169,379	4,823,243
Premises and equipment, net of accumulated depreciation	190,812	195,212
Goodwill	204,523	205,574
Company-owned life insurance	187,253	153,821
Other real estate owned (“OREO”)	6,254	13,554
Accrued interest receivable	27,729	27,063
Mortgage servicing rights, net of accumulated amortization and impairment reserve	15,621	14,038
Deferred tax asset, net	0	4,874
Core deposit intangibles, net of accumulated amortization	10,589	13,282
Other assets	78,074	73,495
Total assets	8,728,196	8,609,936
Deposits:
Non-interest bearing	1,823,716	1,791,364
Interest bearing	5,265,221	5,214,848
Total deposits	7,088,937	7,006,212
Securities sold under repurchase agreements	510,635	502,250
Accounts payable and accrued expenses	53,042	66,164
Accrued interest payable	4,960	5,833
Deferred tax liability, net	9,765	0
Long-term debt	27,885	38,067
Other borrowed funds	2	9
Subordinated debentures held by subsidiary trusts	82,477	82,477
Total liabilities	7,777,703	7,701,012
Stockholders’ equity:
Nonvoting noncumulative preferred stock without par value; authorized 100,000 shares; no shares issued or outstanding as of December 31, 2015 and 2014	0	0
Common stock	311,720	323,596
Retained earnings	638,367	587,862
Accumulated other comprehensive gain (loss), net	406	(2,534)
Total stockholders’ equity	950,493	908,924
Total liabilities and stockholders’ equity	$ 8,728,196	$ 8,609,936