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Leases - Summary of Total Lease Costs and Other Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Lease cost:
Operating lease cost	$ 6,547	$ 19,479
Short-term lease cost	205	637
Variable lease cost	1,423	3,562
Total lease cost	8,175	23,678
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	6,420	19,045
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 2,507	$ 11,943

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Cash paid for amounts included in the measurement of lease liabilities.

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Amount of lease cost recognized by lessee for lease contract.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of short-term lease cost, excluding expense for lease with term of one month or less.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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