Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 201,124	$ 146,779
Interest bearing deposits in banks	681,564	635,149
Federal funds sold	146	95
Total cash and cash equivalents	882,834	782,023
Investment securities:
Available-for-sale	2,111,697	1,611,698
Held-to-maturity (estimated fair values of $510,405 and $513,273 at September 30, 2017 and December 31, 2016, respectively)	505,985	512,770
Total investment securities	2,617,682	2,124,468
Loans held for investment	7,502,387	5,416,750
Mortgage loans held for sale	49,729	61,794
Total loans	7,552,116	5,478,544
Less allowance for loan losses	74,572	76,214
Net loans	7,477,544	5,402,330
Goodwill	445,028	212,820
Company-owned life insurance	258,929	198,116
Premises and equipment, net of accumulated depreciation	242,940	194,457
Accrued interest receivable	40,621	29,852
Mortgage servicing rights, net of accumulated amortization and impairment reserve	24,372	18,457
Core deposit intangibles, net of accumulated amortization	50,971	9,648
Other real estate owned (“OREO”)	10,344	10,019
Deferred tax asset, net	5,343	0
Other assets	149,865	81,705
Total assets	12,206,473	9,063,895
Deposits:
Non-interest bearing	2,965,332	1,906,257
Interest bearing	6,968,136	5,469,853
Total deposits	9,933,468	7,376,110
Securities sold under repurchase agreements	635,288	537,556
Accounts payable and accrued expenses	92,135	44,923
Accrued interest payable	5,648	5,421
Deferred tax liability	0	6,839
Long-term debt	8,039	27,970
Other borrowed funds	30,008	6
Subordinated debentures held by subsidiary trusts	82,477	82,477
Total liabilities	10,787,063	8,081,302
Stockholders’ equity:
Nonvoting noncumulative preferred stock without par value; authorized 100,000 shares; no shares issued and outstanding as of September 30, 2017 or December 31, 2016	0	0
Common stock	686,508	296,071
Retained earnings	731,879	694,650
Accumulated other comprehensive income (loss), net	1,023	(8,128)
Total stockholders’ equity	1,419,410	982,593
Total liabilities and stockholders’ equity	$ 12,206,473	$ 9,063,895