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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Commitments and Contingencies - Additional Information (Details) $ in Millions	Dec. 31, 2019 USD ($)	Nov. 25, 2015 item
Construction Contract with SHI \| Pending Litigation
Loss Contingencies [Line Items]
Number of arbitrators \| item		3
Primary Beneficiary \| Surety Bond
Loss Contingencies [Line Items]
Contingent liability related to letters of credit \| $	$ 5.4