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LEASES (Tables)
 6 Months Ended
Jun. 30, 2020
Leases [Abstract]  
Schedule of Lease Costs and Other Lease Information
A schedule of lease costs and other lease information follows:
Three Months Ended
June 30,		Six Months Ended
June 30,
2020201920202019
Lease cost:
Amortization of right-of-use assets$859  $503  $1,591  $912  
Interest expense290  186  536  342  
Fixed lease cost - vehicles, equipment and property2,171  2,342  4,588  4,921  
Fixed lease cost - landfill operating leases1,795  1,975  3,468  3,623  
Fixed lease cost3,966  4,317  8,056  8,544  
Short-term lease cost729  1,092  1,658  1,750  
Variable lease cost129  35  261  42  
Total lease cost$5,973  $6,133  $12,102  $11,590  
Other information:
Cash paid for amounts included in the measurement of lease liabilities:
Financing cash flows for finance leases$981  $733  $1,942  $1,204  
Operating cash flows for operating leases$3,272  $4,831  $5,714  $6,874  
Right-of-use assets obtained in exchange for new finance lease liabilities$5,391  $4,384  $11,793  $6,857  
Right-of-use assets obtained in exchange for new operating lease liabilities$776  $173  $3,142  $588  
June 30,
2020
Weighted-average remaining lease term - finance leases (years)6.1
Weighted-average remaining lease term - operating leases (years)11.8
Weighted-average discount rate - finance leases4.6 %
Weighted-average discount rate - operating leases5.1 %
Schedule of Estimated Minimum Future Finance Lease Obligations
Estimated minimum future lease obligations are as follows:
Operating LeasesFinance Leases
Fiscal year ending December 31, 2020$7,512  $2,928  
Fiscal year ending December 31, 202112,145  5,706  
Fiscal year ending December 31, 20229,486  5,113  
Fiscal year ending December 31, 20237,296  4,947  
Fiscal year ending December 31, 20246,638  4,847  
Thereafter63,964  9,778  
Total lease payments107,041  33,319  
Less: interest expense(28,416) (5,056) 
Lease liability balance$78,625  $28,263  
Schedule of Estimated Minimum Future Operating Lease Obligations
Estimated minimum future lease obligations are as follows:
Operating LeasesFinance Leases
Fiscal year ending December 31, 2020$7,512  $2,928  
Fiscal year ending December 31, 202112,145  5,706  
Fiscal year ending December 31, 20229,486  5,113  
Fiscal year ending December 31, 20237,296  4,947  
Fiscal year ending December 31, 20246,638  4,847  
Thereafter63,964  9,778  
Total lease payments107,041  33,319  
Less: interest expense(28,416) (5,056) 
Lease liability balance$78,625  $28,263