Statement Of Cash Flow Information - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Supplemental Cash Flow Information [Abstract]
Non-cash capital additions	$ 0.3	$ 1.6

Future cash outflow to pay for purchases of fixed assets that have occurred.

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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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