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DIVIDENDS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 1 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 14, 2017 | Mar. 15, 2017 | Jul. 31, 2017 | May 31, 2017 | Feb. 28, 2017 | Jun. 30, 2017 | Jun. 30, 2016
Dividends per Share [Abstract] |  |  |  |  |  |  |
Payment of cash dividends |  |  |  |  |  | $ 38,042 | $ 39,698
Dividend Declared 2017-Q1 [Member] |  |  |  |  |  |  |
Dividends per Share [Abstract] |  |  |  |  |  |  |
Dividend payable, date declared |  |  |  |  |  | 2017-02 |
Dividend payable per share (in dollars per share) |  |  |  |  | $ 0.36 |  |
Payment of cash dividends |  | $ 19,000 |  |  |  |  |
Dividend payable, date to be paid |  |  |  |  |  | Mar. 15, 2017 |
Dividend payable, date of record |  |  |  |  |  | Feb. 27, 2017 |
Dividend Declared 2017-Q2 [Member] |  |  |  |  |  |  |
Dividends per Share [Abstract] |  |  |  |  |  |  |
Dividend payable, date declared |  |  |  |  |  | 2017-05 |
Dividend payable per share (in dollars per share) |  |  |  | $ 0.36 |  |  |
Payment of cash dividends | $ 19,100 |  |  |  |  |  |
Dividend payable, date to be paid |  |  |  |  |  | Jun. 14, 2017 |
Dividend payable, date of record |  |  |  |  |  | May 26, 2017 |
Dividend Declared 2017 Q3 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Dividends per Share [Abstract] |  |  |  |  |  |  |
Dividend payable, date declared |  |  | 2017-07 |  |  |  |
Dividend payable per share (in dollars per share) |  |  | $ 0.36 |  |  |  |
Dividend payable, date to be paid |  |  | Sep. 13, 2017 |  |  |  |
Dividend payable, date of record |  |  | Aug. 25, 2017 |  |  |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition The month and year (YYYY-MM) that the dividend to be paid was declared. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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