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Other Commitments and Contingencies Other Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2021
Long-term Purchase Commitment [Line Items]  
Long-term Purchase Commitment [Table Text Block]
The total purchase obligations for natural gas, electric and propane supplies are as follows:
Year20222023-20242025-2026Beyond 2026Total
(in thousands)
Purchase Obligations$89,557 $82,412 $70,114 $174,203 $416,286