Commitments and Contingencies - Hurricane Impacts (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($) property
Hurricane Impact
Insurance proceeds for property restoration	$ 6,400
Loss from Catastrophes \| TEXAS
Hurricane Impact
Number of properties significantly damaged \| property		1
Asset write-offs		$ 9,600
Insurance proceeds for property restoration		$ 14,000
Loss from Catastrophes \| LOUISIANA
Hurricane Impact
Number of properties significantly damaged \| property		1
Asset write-offs		$ 11,100
Insurance proceeds for property restoration		$ 27,500

Amount of cash inflow for proceeds from settlement of insurance claim, classified as investing activities. Excludes insurance settlement classified as operating activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 21B
-URI http://asc.fasb.org/extlink&oid=123570139&loc=SL94080549-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromInsuranceSettlementInvestingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration