Commitments and Contingencies - Investment Arrangements (Details) $ in Thousands	Mar. 31, 2022 USD ($) constructionProject	Dec. 31, 2021 USD ($)
Other Commitments [Line Items]
Number of joint ventures | constructionProject	3
Cash	$ 233,133	$ 360,736
Proportionately Consolidated Non-Controlled Joint Venture
Other Commitments [Line Items]
Cash	$ 26,800	$ 14,600
Proportionately Consolidated Non-Controlled Joint Venture | Joint Ventures That Provide Electrical Transmission Infrastructure Services | Minimum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	85.00%
Proportionately Consolidated Non-Controlled Joint Venture | Joint Ventures That Provide Electrical Transmission Infrastructure Services | Maximum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	90.00%
Proportionately Consolidated Non-Controlled Joint Venture | Joint Venture Civil Construction Project | Minimum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	30.00%
Proportionately Consolidated Non-Controlled Joint Venture | Joint Venture Civil Construction Project | Maximum
Other Commitments [Line Items]
Proportionately consolidated non-controlled joint venture, ownership percentage	50.00%