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CASH DIVIDENDS (Details) - $ / shares			1 Months Ended					12 Months Ended
	Apr. 10, 2018	Apr. 10, 2017	Oct. 31, 2017	Sep. 30, 2017	Oct. 28, 2016	Sep. 30, 2016	Sep. 30, 2015	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
CASH DIVIDENDS
Regular cash dividend declared per common stock				$ 1.00		$ 0.70	$ 0.70	$ 1.00	$ 1.00	$ 0.70
Regular cash dividend paid per common stock			$ 1.00		$ 0.70
Dividend record date		Apr. 20, 2018		Oct. 20, 2017
Regular quarterly cash dividend declared per common stock	$ 0.25
Special Cash dividend declared per common stock						$ 0.30
Special cash dividend paid per common stock					$ 0.30
Dividend declared date		Apr. 10, 2018
Dividend declared payment date		Apr. 30, 2018

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- Definition

Aggregate regular quarterly dividends declared during the period for each share of common stock outstanding.

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- Definition

Aggregate special dividends paid during the period for each share of common stock outstanding.

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- Definition

Aggregate special dividends declared during the period for each share of common stock outstanding.

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

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Aggregate dividends paid 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

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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

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Date the dividend to be paid was declared, 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=98513485&loc=d3e4304-108586

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Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

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