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Inventories (Tables)
 9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory, Noncurrent
Inventories, net of reserves, consist of the following:
 
 
 
September 30,

2018
 
 
December 31,

2017
 
(in thousands)
 
 
 
 
 
 
Refrigerants and cylinders
 
$
117,626
 
 
$
174,262
 
Less:  reserves
 
 
(11,118
)
 
 
(1,777
)
Total
 
$
106,508
 
 
$
172,485