Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019
Receivables [Abstract]
Accounts receivable	$ 247,178	$ 262,491
Allowance for doubtful accounts	(5,142)	(4,906)
Accounts receivable, net	$ 242,036	$ 257,585

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant