XML 12 R39.htm IDEA: XBRL DOCUMENT v3.2.0.727
Commitments and Contingencies - Additional Information (Detail)
$ in Thousands
 1 Months Ended 6 Months Ended
Nov. 30, 2011
USD ($)
Sep. 30, 2011
USD ($)
Jun. 30, 2015
USD ($)
a
Apr. 30, 2011
USD ($)
May. 31, 2009
USD ($)
Greenwood Street Landfill [Member]          
Contingencies And Commitments [Line Items]          
Future remediation costs     $ 129    
Greenwood Street Landfill [Member] | Administrative Penalty [Member]          
Contingencies And Commitments [Line Items]          
Future remediation costs     $ 172    
Potsdam Environmental Remediation Liability [Member]          
Contingencies And Commitments [Line Items]          
Scrap yard and solid waste transfer station | a     25    
Estimate of total undiscounted costs associated with implementing the preferred remedies       $ 12,130 $ 10,219
Risk free interest rate     1.70%    
Potsdam Environmental Remediation Liability [Member] | Motors Liquidation Trust - DEC [Member]          
Contingencies And Commitments [Line Items]          
Future remediation costs   $ 3,000      
Potsdam Environmental Remediation Liability [Member] | Motors Liquidation Trust - Casella Waste Systems, Inc [Member]          
Contingencies And Commitments [Line Items]          
Future remediation costs $ 100