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SUBSEQUENT EVENTS (Detail Textuals) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 04, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | 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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared per share (in dollars per share) |  | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 |  |  |  |  | $ 0.72 | $ 0.72 | $ 0.68
Dividends payable, payment date |  | Dec. 10, 2018 | Sep. 17, 2018 | Jun. 18, 2018 | Mar. 26, 2018 | Dec. 11, 2017 | Sep. 18, 2017 | Jun. 20, 2017 | Apr. 03, 2017 | Dec. 12, 2016 | Sep. 19, 2016 | Jun. 20, 2016 | Mar. 28, 2016 |  |  |
Dividends payable, record date |  | Dec. 03, 2018 | Sep. 10, 2018 | Jun. 11, 2018 | Mar. 19, 2018 | Dec. 04, 2017 | Sep. 11, 2017 | Jun. 13, 2017 | Mar. 27, 2017 | Dec. 05, 2016 | Sep. 12, 2016 | Jun. 13, 2016 | Mar. 21, 2016 |  |  |
Proceeds from Lines of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,000 | $ 5,000 | $ 5,000
Credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Lines of Credit |  |  |  |  | $ 5,000 |  |  |  |  |  |  |  |  |  |  |
Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared per share (in dollars per share) | $ 0.18 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, declared date | Mar. 04, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, payment date | Mar. 25, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable, record date | Mar. 18, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent event | Credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increased balance after additional borrowings on credit facility | $ 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition Date the dividend to be paid was declared, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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