Commitments and Contingencies - Additional Information (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Commitments And Contingencies Disclosure [Line Items]
Restricted cash	$ 76,955,000	$ 74,147,000
Containers orders placed	258,446,000
Future minimum lease payment obligations	12,888,000
Fleet Management Agreements
Commitments And Contingencies Disclosure [Line Items]
Future minimum lease payment obligations	$ 0

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 954
-SubTopic 210
-Section 45
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-URI http://asc.fasb.org/extlink&oid=120413173&loc=SL116631458-115580

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant