Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28541-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

BORROWINGS - Convertible Notes Narrative (Details)		3 Months Ended	9 Months Ended
BORROWINGS - Convertible Notes Narrative (Details)	Jun. 09, 2020 USD ($) tradingDay $ / shares Rate	Jul. 03, 2020 USD ($)	Jul. 03, 2020 USD ($)	Jun. 28, 2019 USD ($)	Jun. 04, 2020 USD ($) $ / shares
Debt Instrument [Line Items]
Proceeds from issuance of convertible debt			$ 200,000,000.0	$ 0
Convertible Debt \| Convertible Notes
Debt Instrument [Line Items]
Face amount	$ 200,000,000.0				$ 200,000,000.0
Interest rate	4.00%
Proceeds from issuance of convertible debt	$ 193,100,000
Conversion ratio \| Rate	4.805%
Conversion price (in dollars per share) \| $ / shares	$ 20.81				$ 20.81
Threshold percentage of stock price trigger	130.00%
Threshold trading days \| tradingDay	20
Threshold consecutive trading days \| tradingDay	30
Consecutive business days	5 days
Consecutive trading day measurement period	5 days
Threshold for measurement period	98.00%
Interest expense		$ 1,000,000.0
Interest expense, contractual interest coupon		500,000
Amortization of debt discount		$ 500,000