Quarterly report pursuant to Section 13 or 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
Sep. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing $ 3,529 $ 5,829  
Total Loans 6,148,918 5,671,462 $ 5,543,621
Nonaccrual 12,677 11,936  
Current 6,046,978 5,542,840  
Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 62,346 73,737 78,606
Current 55,780 64,455  
30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 13,755 27,787  
60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 9,633 9,333  
Construction and Land Development      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 610 128  
Total Loans 776,430 749,720 694,645
Nonaccrual 2,301 2,113  
Current 769,308 737,958  
Construction and Land Development | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 3,205 5,986 7,628
Current 3,176 5,376  
Construction and Land Development | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 309 3,155  
Construction and Land Development | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 697 380  
Commercial Real Estate - Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 304 103  
Total Loans 857,142 860,086 863,578
Nonaccrual 1,609 3,904  
Current 834,389 826,859  
Commercial Real Estate - Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 19,064 27,388 28,694
Current 17,693 24,837  
Commercial Real Estate - Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,411 1,714  
Commercial Real Estate - Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 365 118  
Commercial Real Estate - Non-Owner Occupied      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 0 723  
Total Loans 1,454,828 1,270,480 1,223,607
Nonaccrual 0 100  
Current 1,436,363 1,255,367  
Commercial Real Estate - Non-Owner Occupied | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 18,141 13,519 13,326
Current 16,095 12,562  
Commercial Real Estate - Non-Owner Occupied | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 324 771  
Commercial Real Estate - Non-Owner Occupied | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Multifamily Real Estate      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 0 272  
Total Loans 339,313 322,528 329,959
Nonaccrual 0 0  
Current 337,234 320,701  
Multifamily Real Estate | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 2,079 1,555 1,943
Current 2,079 1,555  
Multifamily Real Estate | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Multifamily Real Estate | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 0 0  
Commercial & Industrial      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 77 124  
Total Loans 509,857 435,365 409,657
Nonaccrual 1,344 429  
Current 506,673 431,916  
Commercial & Industrial | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 1,145 1,813 2,245
Current 1,043 1,583  
Commercial & Industrial | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 567 1,056  
Commercial & Industrial | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 51 27  
Residential 1-4 Family      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 2,005 3,638  
Total Loans 999,361 978,469 987,788
Nonaccrual 5,279 3,563  
Current 963,919 928,312  
Residential 1-4 Family | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 16,828 21,159 22,379
Current 14,367 17,093  
Residential 1-4 Family | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 4,985 15,023  
Residential 1-4 Family | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 6,345 6,774  
Auto      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 28 60  
Total Loans 255,188 234,061 225,994
Nonaccrual 231 192  
Current 252,844 231,264  
Auto | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 0 0 0
Auto | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,846 2,312  
Auto | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 239 233  
HELOC      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 407 762  
Total Loans 524,097 516,726 514,362
Nonaccrual 1,464 1,348  
Current 517,229 509,124  
HELOC | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 1,498 1,791 1,812
Current 941 923  
HELOC | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 2,600 2,589  
HELOC | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 899 1,112  
Consumer and all other      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Greater than 90 Days and still Accruing 98 19  
Total Loans 432,702 304,027 294,031
Nonaccrual 449 287  
Current 429,019 301,339  
Consumer and all other | Purchased Impaired      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total Loans 386 526 $ 579
Current 386 526  
Consumer and all other | 30 to 59 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due 1,713 1,167  
Consumer and all other | 60 to 89 Days Past Due      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Past Due $ 1,037 $ 689