XML 63 R52.htm IDEA: XBRL DOCUMENT v3.7.0.1
Related Party Transactions - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jan. 01, 2018
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Related Party Transaction [Line Items]            
Dividends on preferred stocks   $ 75,000   $ 75,000 $ 150,000 $ 150,000
Jack E. Golsen [Member]            
Related Party Transaction [Line Items]            
Retirement date         Dec. 31, 2017  
Jack E. Golsen [Member] | Operating Other Expense [Member]            
Related Party Transaction [Line Items]            
Extinguishment of estimated death benefit liability     $ 1,400,000      
Jack E. Golsen [Member] | Scenario, Forecast [Member] | Transition Agreement [Member]            
Related Party Transaction [Line Items]            
Agreement commencement date Jan. 01, 2018          
Payment of annual cash retainer fee $ 480,000          
Amount payable to cover certain monthly expense 4,400          
Severance agreement, one-time payment $ 2,320,000          
Golsen Holders [Member]            
Related Party Transaction [Line Items]            
Dividends on preferred stocks         $ 0 $ 0
Golsen Holders [Member] | Cumulative Preferred Stock [Member]            
Related Party Transaction [Line Items]            
Preferred stock, accumulated dividends   $ 453,000     $ 453,000