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CLOSURE AND POST-CLOSURE LIABILITIES (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
Changes to post-closure liabilities  
Beginning balance $ 58,331
Measurement period adjustments from prior period acquisitions 596
New asset retirement obligations 431
Accretion 1,157
Changes in estimates recorded to statement of operations (6)
Expenditures (192)
Currency translation and other 34
Ending balance $ 60,351
Credit-adjusted risk-free rate 6.12%
Landfill Retirement Liability  
Changes to post-closure liabilities  
Beginning balance $ 30,630
Measurement period adjustments from prior period acquisitions 0
New asset retirement obligations 431
Accretion 534
Changes in estimates recorded to statement of operations 0
Expenditures (119)
Currency translation and other 20
Ending balance 31,496
Non-Landfill Retirement Liability  
Changes to post-closure liabilities  
Beginning balance 27,701
Measurement period adjustments from prior period acquisitions 596
New asset retirement obligations 0
Accretion 623
Changes in estimates recorded to statement of operations (6)
Expenditures (73)
Currency translation and other 14
Ending balance $ 28,855