Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=123594786&loc=SL75136599-209740

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+ References

No definition available.

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- Definition

Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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- Definition

Amount of transfers of financial instruments classified measured on a recurring basis between the fair value hierarchy level 1, level 2 and level 3.

+ References

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Fair Value Accounting (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value Accounting
Other investments, at fair value	$ 0	$ 293	$ 3,676
Fair Value Transfers Between Levels	0
Fair Value, Inputs, Level 3 [Member] \| Used mill equipment, Canada
Fair Value Accounting
Used mill equipment (non-recurring)
Recurring
Fair Value Accounting
Other investments, at fair value	0	293
Recurring \| Fair Value, Inputs, Level 1 [Member]
Fair Value Accounting
Other investments, at fair value	0	293
Recurring \| Fair Value, Inputs, Level 3 [Member]
Fair Value Accounting
Other investments, at fair value	0	$ 0
Non-recurring \| Used mill equipment, Canada
Fair Value Accounting
Used mill equipment (non-recurring)	0
Non-recurring \| Fair Value, Inputs, Level 1 [Member] \| Used mill equipment, Canada
Fair Value Accounting
Used mill equipment (non-recurring)	0
Non-recurring \| Fair Value, Inputs, Level 3 [Member] \| Used mill equipment, Canada
Fair Value Accounting
Used mill equipment (non-recurring)	$ 0