SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES - Comprehensive Income (Loss) (Details) $ in Millions	3 Months Ended
Dec. 31, 2016 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Deferred tax asset on unrealized foreign currency losses	$ 8.6
Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Comprehensive income - deferred tax assets change in amount	$ (8.6)

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on foreign currency transactions.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 20
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=115928272&loc=d3e28680-109314

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

Name:	us-gaap_DeferredTaxAssetsUnrealizedCurrencyLosses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant