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Supplemental Cash Flow Information (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Supplemental Cash Flow Information [Abstract] |  |  |
Net capital spending | $ 41,576 | $ 26,751 | $ 35,075

X
- Definition The net cash outflow or inflow from purchases, sales and disposals of property, plant and equipment and other productive assets, including intangibles. + References No definition available. + Details
Name: | us-gaap_PaymentsForProceedsFromProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration