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Commitments and Contingent Liabilities - Maximum Potential Total of Future Payments Under Commitment Instruments (Details)
$ in Thousands
Dec. 31, 2022
USD ($)
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments $ 275,383
Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 171,302
Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 104,081
Less Than 1  Year  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 272,801
Less Than 1  Year | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 171,302
Less Than 1  Year | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 101,499
1-3 Years  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 2,582
1-3 Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
1-3 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 2,582
3-5 Years  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
3-5 Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
3-5 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Beyond 5  Years  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Beyond 5  Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Beyond 5  Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Firm Transportation | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 168,215
Firm Transportation | Less Than 1  Year | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 168,215
Firm Transportation | 1-3 Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Firm Transportation | 3-5 Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Firm Transportation | Beyond 5  Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Other | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 3,087
Other | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 8,621
Other | Less Than 1  Year | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 3,087
Other | Less Than 1  Year | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 7,299
Other | 1-3 Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Other | 1-3 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 1,322
Other | 3-5 Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Other | 3-5 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Other | Beyond 5  Years | Letters of Credit:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Other | Beyond 5  Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Employee-Related | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 2,250
Employee-Related | Less Than 1  Year | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 2,250
Employee-Related | 1-3 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Employee-Related | 3-5 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Employee-Related | Beyond 5  Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Environmental | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 11,940
Environmental | Less Than 1  Year | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 10,680
Environmental | 1-3 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 1,260
Environmental | 3-5 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Environmental | Beyond 5  Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Financial Guarantees | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 81,270
Financial Guarantees | Less Than 1  Year | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 81,270
Financial Guarantees | 1-3 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Financial Guarantees | 3-5 Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments 0
Financial Guarantees | Beyond 5  Years | Surety Bonds:  
Loss Contingencies [Line Items]  
Maximum potential total of future payments under commitments $ 0