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Revenue Recognition - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Deferred revenue, revenue recognized	$ 14,000	$ 18,000
Cumulative catch-up adjustment to revenue from change in estimates	$ 10,200	(1,400)
Cumulative catch-up adjustment to diluted earnings per share from change in estimates (in dollars per share)	$ 0.12
Deferred contract cost capitalization	$ 2,491	1,300
Deferred contract cost amortization	$ 2,287	$ 2,200

X

- Definition

Capitalized Contract Cost, Capitalized During Period

+ References

No definition available.

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X

- Definition

Contract with Customer, Asset, Cumulative Catch-Up Adjustment To Revenue, Change In Estimate Of Transaction Price, Effect Of Change On Diluted Earnings Per Share

+ References

No definition available.

+ Details

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X

- Definition

Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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- Definition

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130551-203045

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130549-203045

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- References

No definition available.

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