Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 302,069	$ 410,575
Federal funds sold	555	552
Total cash and cash equivalents	302,624	411,127
Available for sale securities, at fair value	306,777	84,155
Held to maturity securities, at cost (fair value of $8,656,409 and $9,081,236, respectively)	8,645,163	9,324,811
Total securities	8,951,940	9,408,966
Loans held for sale	20,315	29,367
Loans held for investment	10,567,060	10,340,946
Total loans	10,587,375	10,370,313
Less: allowance for credit losses	(87,006)	(86,440)
Loans, net	10,500,369	10,283,873
Accrued interest receivable	57,382	56,532
Goodwill	1,900,845	1,900,845
Core deposit intangibles, net	30,299	32,883
Bank premises and equipment, net	262,479	257,046
Other real estate owned	2,005	1,805
Bank owned life insurance (BOLI)	261,372	260,335
Federal Home Loan Bank of Dallas stock	56,459	55,959
Other assets	49,447	24,031
TOTAL ASSETS	22,375,221	22,693,402
Deposits:
Noninterest-bearing	5,691,236	5,666,115
Interest-bearing	11,196,393	11,590,443
Total deposits	16,887,629	17,256,558
Other borrowings	940,874	1,031,126
Securities sold under repurchase agreements	313,825	284,720
Accrued interest payable	5,171	4,201
Other liabilities	99,827	63,973
Total liabilities	18,247,326	18,640,578
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS’ EQUITY:
Preferred stock, $1 par value; 20,000,000 shares authorized; none issued or outstanding
Common stock, $1 par value; 200,000,000 shares authorized; 69,261,431 shares issued and outstanding at June 30, 2019; 69,846,825 shares issued and outstanding at December 31, 2018	69,261	69,847
Capital surplus	2,012,665	2,045,351
Retained earnings	2,044,696	1,937,316
Accumulated other comprehensive income —net unrealized gain on available for sale securities, net of tax expense of $338 and $82, respectively	1,273	310
Total shareholders’ equity	4,127,895	4,052,824
TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY	$ 22,375,221	$ 22,693,402