XML 87 R73.htm IDEA: XBRL DOCUMENT v3.8.0.1
COMMITMENTS AND CONTINGENCIES - Narrative (Detail)
$ in Thousands
 12 Months Ended
Apr. 28, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
executive_officer
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Apr. 26, 2017
USD ($)
Jan. 29, 2016
Apr. 30, 2011
USD ($)
May 31, 2009
USD ($)
Dec. 20, 2000
a
Other Commitments [Line Items]                    
Monthly payments (up to)     $ 20              
Total rent expense under operating leases charged to operations     $ 12,242 $ 11,437 $ 9,392          
Number of executive officers | executive_officer     5              
Intangible assets, useful life     10 years              
Contract extension period     1 year              
Total annual commitments for salaries     $ 1,785              
Notice of Intent to Sue under the Resource Conservation and Recovery Act                    
Other Commitments [Line Items]                    
Agreement in principle amount (up to)           $ 5,000        
Maximum                    
Other Commitments [Line Items]                    
Initial term of employment contract     3 years              
Intangible assets, useful life     10 years              
Salary and bonuses payment range     3 years              
Maximum | Employment Contracts                    
Other Commitments [Line Items]                    
Intangible assets, useful life     2 years              
Minimum                    
Other Commitments [Line Items]                    
Initial term of employment contract     1 year              
Intangible assets, useful life     5 years              
Salary and bonuses payment range     1 year              
Minimum | Employment Contracts                    
Other Commitments [Line Items]                    
Intangible assets, useful life     1 year              
Southbridge Landfill                    
Other Commitments [Line Items]                    
Risk free interest rate     2.60%              
Potsdam Environmental Remediation Liability                    
Other Commitments [Line Items]                    
Risk free interest rate     1.50%              
Number of acres composing solid waste transfer station (in acres) | a                   25
Estimate of total undiscounted costs associated with implementing the preferred remedies               $ 12,130 $ 10,219  
Remediation activities, participant share percentage             15.00%      
MADEP | Notice of Intent to Sue under the Resource Conservation and Recovery Act                    
Other Commitments [Line Items]                    
Agreement in principle amount (up to)           $ 10,000        
Scenario, Forecast | Southbridge Landfill | Maximum                    
Other Commitments [Line Items]                    
Future cash payments   $ 3,069                
21E Settlement and Water System Construction Funding Agreement | Bonds                    
Other Commitments [Line Items]                    
Facility term 20 years                  
21E Settlement and Water System Construction Funding Agreement | Bonds | Maximum                    
Other Commitments [Line Items]                    
Anticipated costs $ 5,000