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Commitments and Contingencies - Collective Bargaining Agreements and Environmental Contingencies (Details) | 12 Months Ended
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Dec. 31, 2015 location employee item
Environmental Contingencies |
Ownership interest in domestic subsidiaries (as a percent) | 100.00%
Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Number of Location Entity Operates | location | 51
Expiration period of collective bargaining agreements | 5 years
Total employees | Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Percentage of employees covered by collective bargaining agreements | 11.00%
Number of employees | employee | 1,580
Number of collective bargaining agreements that expire over the next five years | item | 41
Employees covered by collective bargaining agreements that expire during 2016 |
Collective Bargaining Agreements |
Number of employees | employee | 500
Employees covered by collective bargaining agreements that expire during 2016 | Employees covered by collective bargaining agreements |
Collective Bargaining Agreements |
Number of collective bargaining agreements that expire within one year | item | 21

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- Definition Represents the expiration period of collective bargaining agreements. + References No definition available. + Details
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- Definition Represents the concentration risk value amount. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Represents the parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
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- Definition Represents the number of collective bargaining agreements that expire within one year. + References No definition available. + Details
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- Definition Represents the number of collective bargaining agreements that will expire at various times over the next five years. + References No definition available. + Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 + Details
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