CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks	$ 219,243	$ 206,607
Interest bearing deposits with other banks and other short-term investments	118,660	172,127
Cash and cash equivalents	337,903	378,734
Time deposits in other financial institutions	3,129	3,564
Securities:
Carried at fair value (cost of $6,024,225 at December 31, 2020, and cost of $3,311,433 at December 31, 2019)	6,127,975	3,312,796
Held to maturity, at cost (fair value of $100,041 at December 31, 2020, and $100,484 at December 31, 2019)	88,839	91,324
Other investments, at cost	75,253	31,321
Loans held for sale	57,949	26,748
Loans receivable:
Held to maturity	10,023,051	8,367,917
Allowance for credit losses	(131,606)	(70,395)
Loans receivable, net	9,891,445	8,297,522
Premises, furniture and equipment, net	219,595	197,558
Premises, furniture and equipment held for sale	6,499	2,967
Other real estate, net	6,624	6,914
Goodwill	576,005	446,345
Core deposit intangibles and customer relationship intangibles, net	42,383	48,688
Servicing rights, net	6,052	6,736
Cash surrender value on life insurance	187,664	171,625
Other assets	281,024	186,755
TOTAL ASSETS	17,908,339	13,209,597
Deposits:
Demand	5,688,810	3,543,863
Savings	8,019,704	6,307,425
Time	1,271,391	1,193,043
Total deposits	14,979,905	11,044,331
Short-term borrowings	167,872	182,626
Other borrowings	457,042	275,773
Accrued expenses and other liabilities	224,289	128,730
TOTAL LIABILITIES	15,829,108	11,631,460
STOCKHOLDERS' EQUITY:
Common stock (par value $1 per share; 60,000,000 shares authorized at both December 31, 2020 and December 31, 2019; issued 42,093,862 shares at December 31, 2020, and 36,704,278 shares at December 31, 2019)	42,094	36,704
Capital surplus	1,062,083	839,857
Retained earnings	791,630	702,502
Accumulated other comprehensive income (loss)	72,719	(926)
TOTAL STOCKHOLDERS' EQUITY	2,079,231	1,578,137
TOTAL LIABILITIES AND EQUITY	17,908,339	13,209,597
Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0
Preferred stock, shares authorized (in shares)	6,104	6,104
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Series A Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0
Preferred stock, shares authorized (in shares)	16,000	16,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Series B Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock, shares authorized (in shares)	81,698	81,698
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Series C Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0
Preferred stock, shares authorized (in shares)	81,698	81,698
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Series D Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 0	$ 0
Preferred stock, shares authorized (in shares)	3,000	3,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Series E Preferred Stock
STOCKHOLDERS' EQUITY:
Preferred stock	$ 110,705	$ 0
Preferred stock, shares authorized (in shares)	11,500	0
Preferred stock, shares issued (in shares)	11,500	0
Preferred stock, shares outstanding (in shares)	11,500	0
Preferred stock, par value (in dollars per share)	$ 1	$ 1