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LOANS AND ALLOWANCE FOR LOAN LOSSES (Allowance For Loan Losses And Recorded Investment In Financing Receivables) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | $ 14,194,000 |  |  |  | $ 14,747,000 | $ 14,194,000 | $ 14,747,000 | $ 15,172,000
Charge-offs |  |  |  |  |  |  |  |  | (461,000) | (766,000) | (937,000)
Recoveries |  |  |  |  |  |  |  |  | 243,000 | 213,000 | 512,000
Provisions | $ 0 | $ 0 | $ 0 | 0 | $ 0 | $ 0 | $ 0 | 0 | 0 | 0 | 0
Allowance for Loan Losses, Ending Balance | 13,976,000 |  |  |  | 14,194,000 |  |  |  | 13,976,000 | 14,194,000 | 14,747,000
Ending balance: individually evaluated for impairment | 1,229,000 |  |  |  | 932,000 |  |  |  | 1,229,000 | 932,000 | 0
Ending balance: collectively evaluated for impairment | 12,747,000 |  |  |  | 13,262,000 |  |  |  | 12,747,000 | 13,262,000 | 14,747,000
Loans receivables, Ending Balance | 1,244,170,000 |  |  |  | 907,910,000 |  |  |  | 1,244,170,000 | 907,910,000 | 852,960,000
Loans receivables: Ending balance: individually evaluated for impairment | 10,337,000 |  |  |  | 11,945,000 |  |  |  | 10,337,000 | 11,945,000 | 10,491,000
Loans receivables: Ending balance: collectively evaluated for impairment | 1,233,833,000 |  |  |  | 895,965,000 |  |  |  | 1,233,833,000 | 895,965,000 | 842,469,000
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | 3,055,000 |  |  |  | 2,508,000 | 3,055,000 | 2,508,000 | 2,048,000
Charge-offs |  |  |  |  |  |  |  |  | (181,000) | (318,000) | (150,000)
Recoveries |  |  |  |  |  |  |  |  | 21,000 | 45,000 | 369,000
Provisions |  |  |  |  |  |  |  |  | 324,000 | 820,000 | 241,000
Allowance for Loan Losses, Ending Balance | 3,219,000 |  |  |  | 3,055,000 |  |  |  | 3,219,000 | 3,055,000 | 2,508,000
Ending balance: individually evaluated for impairment | 792,000 |  |  |  | 599,000 |  |  |  | 792,000 | 599,000 | 0
Ending balance: collectively evaluated for impairment | 2,427,000 |  |  |  | 2,456,000 |  |  |  | 2,427,000 | 2,456,000 | 2,508,000
Loans receivables, Ending Balance | 165,829,000 |  |  |  | 140,344,000 |  |  |  | 165,829,000 | 140,344,000 | 117,692,000
Loans receivables: Ending balance: individually evaluated for impairment | 1,499,000 |  |  |  | 2,126,000 |  |  |  | 1,499,000 | 2,126,000 | 1,471,000
Loans receivables: Ending balance: collectively evaluated for impairment | 164,330,000 |  |  |  | 138,218,000 |  |  |  | 164,330,000 | 138,218,000 | 116,221,000
Commercial real estate |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | 4,968,000 |  |  |  | 5,216,000 | 4,968,000 | 5,216,000 | 5,872,000
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 61,000 | 0 | 0
Provisions |  |  |  |  |  |  |  |  | 199,000 | (248,000) | (656,000)
Allowance for Loan Losses, Ending Balance | 5,228,000 |  |  |  | 4,968,000 |  |  |  | 5,228,000 | 4,968,000 | 5,216,000
Ending balance: individually evaluated for impairment | 60,000 |  |  |  | 0 |  |  |  | 60,000 | 0 | 0
Ending balance: collectively evaluated for impairment | 5,168,000 |  |  |  | 4,968,000 |  |  |  | 5,168,000 | 4,968,000 | 5,216,000
Loans receivables, Ending Balance | 492,759,000 |  |  |  | 318,980,000 |  |  |  | 492,759,000 | 318,980,000 | 289,899,000
Loans receivables: Ending balance: individually evaluated for impairment | 8,360,000 |  |  |  | 8,764,000 |  |  |  | 8,360,000 | 8,764,000 | 8,185,000
Loans receivables: Ending balance: collectively evaluated for impairment | 484,399,000 |  |  |  | 310,216,000 |  |  |  | 484,399,000 | 310,216,000 | 281,714,000
Commercial real estate construction |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | 147,000 |  |  |  | 112,000 | 147,000 | 112,000 | 194,000
Charge-offs |  |  |  |  |  |  |  |  | 0 | (135,000) | (39,000)
Recoveries |  |  |  |  |  |  |  |  | 80,000 | 132,000 | 0
Provisions |  |  |  |  |  |  |  |  | (101,000) | 38,000 | (43,000)
Allowance for Loan Losses, Ending Balance | 126,000 |  |  |  | 147,000 |  |  |  | 126,000 | 147,000 | 112,000
Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Ending balance: collectively evaluated for impairment | 126,000 |  |  |  | 147,000 |  |  |  | 126,000 | 147,000 | 112,000
Loans receivables, Ending Balance | 35,560,000 |  |  |  | 15,271,000 |  |  |  | 35,560,000 | 15,271,000 | 13,429,000
Loans receivables: Ending balance: individually evaluated for impairment | 0 |  |  |  | 300,000 |  |  |  | 0 | 300,000 | 374,000
Loans receivables: Ending balance: collectively evaluated for impairment | 35,560,000 |  |  |  | 14,971,000 |  |  |  | 35,560,000 | 14,971,000 | 13,055,000
Residential mortgage |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | 3,478,000 |  |  |  | 3,349,000 | 3,478,000 | 3,349,000 | 3,845,000
Charge-offs |  |  |  |  |  |  |  |  | (132,000) | (189,000) | (622,000)
Recoveries |  |  |  |  |  |  |  |  | 62,000 | 25,000 | 136,000
Provisions |  |  |  |  |  |  |  |  | (182,000) | 293,000 | (10,000)
Allowance for Loan Losses, Ending Balance | 3,226,000 |  |  |  | 3,478,000 |  |  |  | 3,226,000 | 3,478,000 | 3,349,000
Ending balance: individually evaluated for impairment | 377,000 |  |  |  | 333,000 |  |  |  | 377,000 | 333,000 | 0
Ending balance: collectively evaluated for impairment | 2,849,000 |  |  |  | 3,145,000 |  |  |  | 2,849,000 | 3,145,000 | 3,349,000
Loans receivables, Ending Balance | 425,893,000 |  |  |  | 348,539,000 |  |  |  | 425,893,000 | 348,539,000 | 357,228,000
Loans receivables: Ending balance: individually evaluated for impairment | 478,000 |  |  |  | 755,000 |  |  |  | 478,000 | 755,000 | 461,000
Loans receivables: Ending balance: collectively evaluated for impairment | 425,415,000 |  |  |  | 347,784,000 |  |  |  | 425,415,000 | 347,784,000 | 356,767,000
Home equity lines of credit |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | 648,000 |  |  |  | 619,000 | 648,000 | 619,000 | 557,000
Charge-offs |  |  |  |  |  |  |  |  | (9,000) | (74,000) | (15,000)
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provisions |  |  |  |  |  |  |  |  | (27,000) | 103,000 | 77,000
Allowance for Loan Losses, Ending Balance | 612,000 |  |  |  | 648,000 |  |  |  | 612,000 | 648,000 | 619,000
Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Ending balance: collectively evaluated for impairment | 612,000 |  |  |  | 648,000 |  |  |  | 612,000 | 648,000 | 619,000
Loans receivables, Ending Balance | 107,792,000 |  |  |  | 70,072,000 |  |  |  | 107,792,000 | 70,072,000 | 60,124,000
Loans receivables: Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Loans receivables: Ending balance: collectively evaluated for impairment | 107,792,000 |  |  |  | 70,072,000 |  |  |  | 107,792,000 | 70,072,000 | 60,124,000
Consumer |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | 923,000 |  |  |  | 1,083,000 | 923,000 | 1,083,000 | 1,050,000
Charge-offs |  |  |  |  |  |  |  |  | (139,000) | (50,000) | (111,000)
Recoveries |  |  |  |  |  |  |  |  | 19,000 | 11,000 | 7,000
Provisions |  |  |  |  |  |  |  |  | (54,000) | (121,000) | 137,000
Allowance for Loan Losses, Ending Balance | 749,000 |  |  |  | 923,000 |  |  |  | 749,000 | 923,000 | 1,083,000
Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Ending balance: collectively evaluated for impairment | 749,000 |  |  |  | 923,000 |  |  |  | 749,000 | 923,000 | 1,083,000
Loans receivables, Ending Balance | 16,337,000 |  |  |  | 14,704,000 |  |  |  | 16,337,000 | 14,704,000 | 14,588,000
Loans receivables: Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Loans receivables: Ending balance: collectively evaluated for impairment | 16,337,000 |  |  |  | 14,704,000 |  |  |  | 16,337,000 | 14,704,000 | 14,588,000
Unallocated |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan Losses, Beginning Balance |  |  |  | $ 975,000 |  |  |  | $ 1,860,000 | 975,000 | 1,860,000 | 1,606,000
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provisions |  |  |  |  |  |  |  |  | (159,000) | (885,000) | 254,000
Allowance for Loan Losses, Ending Balance | 816,000 |  |  |  | 975,000 |  |  |  | 816,000 | 975,000 | 1,860,000
Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Ending balance: collectively evaluated for impairment | 816,000 |  |  |  | 975,000 |  |  |  | 816,000 | 975,000 | 1,860,000
Loans receivables, Ending Balance | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Loans receivables: Ending balance: individually evaluated for impairment | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Loans receivables: Ending balance: collectively evaluated for impairment | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 | $ 0 | $ 0

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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