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v3.22.2.2

Contingencies (Details) |  |  | 3 Months Ended
--- | --- | --- | ---
Apr. 17, 2015 Insurance_company People Plaintiff Entity | Apr. 17, 2013 People | Mar. 31, 2017 processingFacility mine
Loss Contingencies [Line Items] |  |  |
Loss contingency, number of processing facilities | processingFacility |  |  | 3
Pending Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Number of people killed |  | 15 |
Number of people injured |  | 200 |
Number of plaintiffs | Plaintiff | 400 |  |
Number of entities that filed claims | Entity | 9 |  |
Number of people that filed claims | 325 |  |
Number of insurance companies that filed claims | Insurance_company | 80 |  |
IDAHO |  |  |
Loss Contingencies [Line Items] |  |  |
Loss contingency, number of mines | mine |  |  | 18

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- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 + Details
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