Rendering

Component: (Network and Table)
Network
004050 - Disclosure - Inventories (Details)
(http://www.cloudpeakenergy.com/role/InventoriesDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001441849 (http://www.sec.gov/CIK)
InventoriesPeriod [Axis]
2016-12-31
2015-12-31
Inventories
 
 
Materials and supplies
67,933,000  
74,353,000  
Less: Obsolescence allowance
(956,000) 
(988,000) 
Material and supplies, net
66,977,000  
 
73,365,000  
 
Coal inventory
1,706,000  
3,398,000  
Inventories, net
68,683,000  
 
76,763,000