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LOANS AND LEASES - Additional Information (Details) - USD ($) | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Restructured Loans, Portion Determined to be Uncollectible | $ 0 | $ 0 |  |
Purchased impaired loans | 88,343,000 |  | $ 96,320,000 |
Restructured Loans, Nonaccrual Status | 13,100,000 |  | 22,400,000 |
Write-downs | 57,000 | 123,000 |  |
Real Estate Acquired Through Foreclosure | 1,665,000 | 1,065,000 | $ 1,401,000 | $ 2,781,000
Commercial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum | 250,000 |  |  |
Residential real estate |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum | 250,000 |  |  |
Write-downs | $ 57,000 | $ 26,000 |  |

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- Definition Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5162-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4437-111522 + Details
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