Annual report pursuant to Section 13 and 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Segment) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Segment) (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing $ 13,396 $ 8,856  
Total Loans 12,610,936 9,716,207  
Nonaccrual 28,232 26,953 $ 21,700
Current 12,419,378 9,537,156  
30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 50,453 41,434  
60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 12,796 11,587  
Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 86,681 90,221  
Current 70,267 71,213  
Construction and Land Development      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 189 180  
Total Loans 1,250,924 1,194,821  
Nonaccrual 3,703 8,018  
Current 1,231,043 1,177,204  
Construction and Land Development | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 4,563 759  
Construction and Land Development | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 482 6  
Construction and Land Development | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 10,944 8,654  
Current 10,465 7,122  
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 1,062 3,193  
Total Loans 2,041,243 1,337,345  
Nonaccrual 6,003 3,636  
Current 2,001,074 1,294,975  
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 3,482 8,755  
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,184 1,142  
Commercial Real Estate - Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 27,438 25,644  
Current 20,074 20,705  
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 1,451 0  
Total Loans 3,286,098 2,467,410  
Nonaccrual 381 1,789  
Current 3,269,244 2,447,907  
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 457 338  
Commercial Real Estate - Non-Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 41  
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 14,565 17,335  
Current 12,730 15,464  
Multifamily Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 474 0  
Total Loans 633,743 548,231  
Nonaccrual 0 0  
Current 632,952 547,997  
Multifamily Real Estate | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 223 0  
Multifamily Real Estate | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 146  
Multifamily Real Estate | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 94 88  
Current 94 88  
Commercial and Industrial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 449 132  
Total Loans 2,114,033 1,317,135  
Nonaccrual 1,735 1,524  
Current 2,099,974 1,309,581  
Commercial and Industrial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 8,698 3,353  
Commercial and Industrial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,598 389  
Commercial and Industrial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 1,579 2,156  
Current 590 1,017  
Residential 1-4 Family - Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 674 1,409  
Total Loans 724,337 640,419  
Nonaccrual 4,301 2,481  
Current 703,471 614,732  
Residential 1-4 Family - Commercial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,479 6,619  
Residential 1-4 Family - Commercial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,207 1,577  
Residential 1-4 Family - Commercial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 12,205 13,601  
Current 9,667 9,276  
Residential 1-4 Family - Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 4,515 2,437  
Total Loans 890,503 673,909  
Nonaccrual 9,292 7,276  
Current 842,667 630,132  
Residential 1-4 Family - Consumer | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 16,244 12,049  
Residential 1-4 Family - Consumer | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 3,072 5,143  
Residential 1-4 Family - Consumer | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 14,713 16,872  
Current 12,005 12,491  
Residential 1-4 Family - Revolving      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 3,357 440  
Total Loans 659,504 613,383  
Nonaccrual 2,080 1,518  
Current 637,966 600,055  
Residential 1-4 Family - Revolving | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 10,190 4,611  
Residential 1-4 Family - Revolving | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,784 1,644  
Residential 1-4 Family - Revolving | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 4,127 5,115  
Current 3,635 4,365  
Auto      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 272 195  
Total Loans 350,419 301,943  
Nonaccrual 563 576  
Current 346,819 297,442  
Auto | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,525 3,320  
Auto | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 236 403  
Auto | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 4 7  
Current 4 7  
Consumer      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 953 870  
Total Loans 372,853 379,694  
Nonaccrual 77 135  
Current 367,794 376,057  
Consumer | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,128 1,504  
Consumer | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,233 1,096  
Consumer | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 668 32  
Current 659 18  
Other Commercial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater Than 90 Days and Still Accruing 0 0  
Total Loans 287,279 241,917  
Nonaccrual 97 0  
Current 286,374 241,074  
Other Commercial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 464 126  
Other Commercial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Other Commercial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 344 717  
Current $ 344 $ 660