Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.10.0.1
Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
1 Months Ended 12 Months Ended
Oct. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Customer
shares
Dec. 31, 2017
USD ($)
Customer
Dec. 31, 2016
USD ($)
Customer
Jan. 01, 2019
USD ($)
Significant Accounting Policies [Line Items]          
Percentage of LIFO inventory   67.00% 65.00%    
Impairment of goodwill $ 0.0        
Stock repurchase program, authorized amount   $ 35.0      
Stock repurchase program, number of shares repurchased during period (in shares) | shares   400,000      
Multi employer pension plan funded status, percentage   92.00%      
Net cash provided by (used in) operating activities   $ 122.1 $ 49.2 $ 96.0  
Net cash used in financing activities   $ (26.8) $ (13.8) $ (56.5)  
Minimum [Member]          
Significant Accounting Policies [Line Items]          
Contractual term   3 years      
Maximum [Member]          
Significant Accounting Policies [Line Items]          
Contractual term   5 years      
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]          
Significant Accounting Policies [Line Items]          
Number of customers | Customer   0 0 0  
Number of Employees [Member] | Labor Force Concentration Risk [Member]          
Significant Accounting Policies [Line Items]          
Concentration Risk, Percentage   54.00%      
Olin Luotong Corporation [Member]          
Significant Accounting Policies [Line Items]          
Interest in joint venture   80.00%      
Non controlling interest   20.00%      
Accounting Standards Update 2016-09 [Member]          
Significant Accounting Policies [Line Items]          
Net cash provided by (used in) operating activities       $ 0.7  
Net cash used in financing activities       (0.7)  
Additional Paid-in Capital [Member]          
Significant Accounting Policies [Line Items]          
Cumulative effect of new accounting principle in period of adoption       0.5  
Additional Paid-in Capital [Member] | Accounting Standards Update 2016-09 [Member]          
Significant Accounting Policies [Line Items]          
Cumulative effect of new accounting principle in period of adoption       0.5  
Retained Earnings (Accumulated Deficit) [Member]          
Significant Accounting Policies [Line Items]          
Cumulative effect of new accounting principle in period of adoption       (0.5)  
Retained Earnings (Accumulated Deficit) [Member] | Accounting Standards Update 2016-09 [Member]          
Significant Accounting Policies [Line Items]          
Cumulative effect of new accounting principle in period of adoption       $ (0.5)  
Scenario, Forecast [Member] | Accounting Standards Update 2016-02 [Member]          
Significant Accounting Policies [Line Items]          
Estimate of Operating Lease Right-of-Use Asset Upon Adoption of ASC 842         $ 7.0
Estimate of Operating Lease Liability Upon Adoption of ASC 842         $ 7.0