Commitments and Contingencies (Details)	Dec. 31, 2020 USD ($)
Guarantor Obligations [Line Items]
Property casualty insurance deductible per incident	$ 5,000,000.0
Pacific Western Insurance LLC
Guarantor Obligations [Line Items]
Cash and marketable securities	$ 152,800,000

Sum of investments and unrestricted cash as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1,2)
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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