Rendering

Component: (Network and Table)
Network
4181 - Disclosure - COMMITMENTS AND CONTINGENCIES: (Details 2)
(http://www.rocksp.com/role/DisclosureCommitmentsAndContingenciesDetails2)
TableSite Contingency [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001315695 (http://www.sec.gov/CIK)
Environmental mattersPeriod [Axis]
2013-01-01 - 2013-12-31
2012-01-01 - 2012-12-31
Environmental Remediation Contingency [Axis]Environmental Remediation Contingency [Axis]
Environmental Reserves [Member]Environmental Remediation Contingency [Domain]Environmental Reserves [Member]
Range [Axis]Range [Axis]Range [Axis]
Minimum [Member]Maximum [Member]Range [Domain]Range [Domain]Range [Domain]
Accrued environmental liabilities
 
 
42,000,000  
 
38,400,000  
Reclamation obligations
 
 
14,900,000  
 
13,800,000  
Remediation obligation
 
 
26,700,000  
 
23,500,000  
Discounted environmental liabilities
 
 
14,300,000  
 
13,200,000  
Discount rate (as a percent)
.028  
.070  
 
 
 
Undiscounted estimated reserve for environmental liabilities qualifying for discounting
 
 
29,800,000  
 
28,800,000  
Changes in reclamation obligations
 
 
 
 
 
Liability balance at the beginning of the period
 
 
14,900,000  
 
13,800,000  
Accretion expense
 
 
600,000  
 
600,000  
Utilization
 
 
(300,000) 
 
 
Revision to estimates
 
 
100,000  
 
500,000  
Liability balance at the end of the period
 
 
 
 
15,300,000  
 
 
 
14,900,000  
 
Foreign exchange
 
 
 
 
 
Liabilities incurred
 
 
 
 
 
Remediation liabilities maximum payment term
 
 
P30Y  
 
 
Estimated potential range for environmental matters, low end of range
 
 
26,700,000  
 
 
Estimated potential range for environmental matters, high end of range
 
 
46,900,000  
 
 
Charges recorded to increase environmental liabilities
 
 
4,100,000  
 
 
Payments for reclamation and remediation costs
 
 
1,400,000  
 
 
Recurring cost of managing hazardous substances for ongoing operations
 
 
9,200,000  
 
 
Commitments
 
 
 
 
 
Unconditional purchase obligations
 
 
 
92,900,000  
 
Unconditional purchase obligations to be incurred in less than one year
 
 
 
81,500,000  
 
Unconditional purchase obligations to be incurred in two years
 
 
 
11,400,000  
 
Unconditional purchase obligations to be incurred in three years
 
 
 
11,400,000  
 
Unconditional purchase obligations to be incurred in four years
 
 
 
 
 
Unconditional purchase obligations to be incurred in five years
 
 
 
 
 
Unconditional purchase obligations to be incurred after five years