Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks	$ 222,043	$ 228,431
Interest-bearing deposits with banks	1,646,238	1,195,824
Federal funds sold	1,000
Securities held for investment (fair value: $1,903 and $1,433, respectively)	1,903	1,428
Securities available for sale at fair value	489,723	770,704
Loans held for sale	11,001	8,174
Loans (net of unearned interest)	5,662,143	4,975,976
Allowance for loan losses	(54,238)	(51,389)
Loans, net of allowance for loan losses	5,607,905	4,924,587
Premises and equipment, net	206,275	174,362
Other real estate owned	5,607	6,690
Intangible assets, net	22,608	16,470
Goodwill	148,604	79,749
Accrued interest receivable and other assets	202,851	167,839
Total assets	8,565,758	7,574,258
Deposits:
Noninterest-bearing	2,956,370	2,613,876
Interest-bearing	4,527,265	3,991,619
Total deposits	7,483,635	6,605,495
Short-term borrowings	1,100	1,675
Accrued interest payable and other liabilities	49,230	37,495
Junior subordinated debentures	26,804	26,804
Total liabilities	7,560,769	6,671,469
Commitments and contingent liabilities (Note 19)
Stockholders' equity:
Common stock, $1.00 par, 40,000,000 shares authorized; shares issued and outstanding: 32,694,268 and 32,603,926, respectively	32,694	32,604
Capital surplus	153,353	149,709
Retained earnings	815,488	722,615
Accumulated other comprehensive income/(loss), net of income tax of $1,187 and $(731), respectively	3,454	(2,139)
Total stockholders' equity	1,004,989	902,789
Total liabilities and stockholders' equity	8,565,758	7,574,258
Senior Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value
Cumulative Preferred Stock [Member]
Stockholders' equity:
Preferred stock, value