Commitments and Contingencies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Commitments and Contingencies [Line Items]
Purchase Commitments Physical Commodity Requirements Utilization Period	3 years
Unrecorded Unconditional Purchase Obligation, Total	$ 640,770
Capital Addition Purchase Commitments [Member]
Commitments and Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation, Total	$ 292,800
Water Products [Member]
Commitments and Contingencies [Line Items]
Long-term Purchase Commitment, Period	30 years
Maximum | Physical Commodity and Commodity Transportation [Member]
Commitments and Contingencies [Line Items]
Long-term Purchase Commitment, Period	5 years
Maximum | Air Products [Member]
Commitments and Contingencies [Line Items]
Long-term Purchase Commitment, Period	16 years