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Business and Basis of Presentation - Additional Information (Detail)
$ in Thousands
9 Months Ended
Apr. 14, 2017
May 05, 2011
USD ($)
Sep. 30, 2017
t
Subsidiary Sale Of Stock [Line Items]      
State of formation     Delaware
Date of formation     Feb. 07, 2013
Business combination, stock issuance ratio 0.5200    
OCI Beaumont LLC      
Subsidiary Sale Of Stock [Line Items]      
Percentage of common units owned by OCI     80.00%
Methanol      
Subsidiary Sale Of Stock [Line Items]      
Annual production design capacity (metric tons)     912,500
Ammonia      
Subsidiary Sale Of Stock [Line Items]      
Annual production design capacity (metric tons)     331,000
OCI Beaumont LLC      
Subsidiary Sale Of Stock [Line Items]      
State of formation     Texas
Date of formation     Dec. 10, 2010
Business combination, consideration transferred | $   $ 26,500