XML 87 R75.htm IDEA: XBRL DOCUMENT v3.7.0.1
Commitments and Contingencies (Narrative) (Detail)
$ in Thousands, T in Millions
 3 Months Ended 12 Months Ended 150 Months Ended
Apr. 19, 2017
T
Mar. 31, 2017
a
ft
T
Dec. 31, 2016
T
Mar. 31, 2017
a
ft
Dec. 02, 2014
USD ($)
Contingencies And Commitments [Line Items]          
Estimated clean up costs | $         $ 342,000
Chiquita Canyon, LLC [Member]          
Contingencies And Commitments [Line Items]          
Annual tons of waste accepted at landfill     3    
Existing waste footprint of landfill | a   257   257  
Requested footprint in landfill expansion application | a   400   400  
Existing maximum elevation of landfill | ft   1,430   1,430  
Requested maximum elevation in landfill expansion application | ft   1,573   1,573  
Duration of permitting and environmental impact review for conditional use permit to authorize continued operation and expansion of landfill       12 years 6 months  
Recommended condition for approval of conditional use permit, increase in taxes and fees percentage   587.00%      
Environmental Remediation Expense [Member]          
Contingencies And Commitments [Line Items]          
Estimated period to implement cleanup remedy   7 years      
Required period of monitoring following the clean-up   10 years      
Maximum [Member] | Chiquita Canyon, LLC [Member]          
Contingencies And Commitments [Line Items]          
Recommended condition for approval of conditional use permit, annual limit on tonnage the landfill can accept   2      
Current annual limit of overall tonnage at landfill   3      
Subsequent Event [Member] | Chiquita Canyon, LLC [Member]          
Contingencies And Commitments [Line Items]          
Date application for expansion of landfill and extension of conditional use permit was accepted Apr. 19, 2017        
Duration of extension of conditional use permit extension 30 years        
Subsequent Event [Member] | Minimum [Member] | Chiquita Canyon, LLC [Member]          
Contingencies And Commitments [Line Items]          
Company requested increase in fees paid for approval of conditional use permit 50.00%        
Subsequent Event [Member] | Maximum [Member] | Chiquita Canyon, LLC [Member]          
Contingencies And Commitments [Line Items]          
Company requested increase in fees paid for approval of conditional use permit 100.00%        
Company requested annual limit on tonnage the landfill can accept 3