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Exit and Termination Costs - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
One-time minimum volume commitment contract payment |  | $ 28,500,000 |  |  |  | $ 0 | $ 28,500,000 | $ 0
Severance costs |  |  |  |  |  | 567,000 | 5,909,000 | 7,535,000
Restructuring Charges |  |  |  |  |  | 21,661,000 | 547,409,000 | 9,506,000
Workforce Reduction |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Severance costs |  | 3,700,000 |  |  | $ 2,200,000 |  |  |
North Louisiana |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Accretion expense |  |  |  |  |  | 47,900,000 | 20,200,000 |
Exit cost |  | 479,800,000 |  |  |  |  |  |
Severance costs |  | $ 2,500,000 |  |  |  | 416,400,000 |  |
Restructuring Charges | $ 28,200,000 |  |  |  |  |  |  |
Pennsylvania |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Exit cost |  |  | $ 10,400,000 |  |  | 754,000 | $ 10,900,000 | 0
Pennsylvania | Capacity Releases on Transportation Pipelines |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Exit cost |  |  |  |  |  | $ 7,300,000 |  |
Northwest Pennsylvania |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Severance costs |  |  |  | $ 1,400,000 |  |  |  |
Northwest Pennsylvania | Non-Core Assets |  |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |  |
Severance costs |  |  |  |  |  |  |  | $ 819,000

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