Debt - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 09, 2014
Dec. 31, 2015
Mar. 10, 2016
Mar. 09, 2016
Dec. 31, 2014
Working Capital Facility [Member] | U.S. dollar [Member]          
Debt Instrument [Line Items]          
Debt instruments, interest rate description   For the U.S. dollar working capital facility and the acquisition facility, the alternate rate is the Base Rate which is the higher of (a) the U.S. Prime Rate as in effect from time to time, (b) the Federal Funds rate as in effect from time to time plus 0.50% and (c) the one-month Eurocurrency Rate for U.S. dollars as in effect from time to time plus 1.00%.      
Working Capital Facility [Member] | U.S. dollar [Member] | Federal Funds Rate [Member]          
Debt Instrument [Line Items]          
Debt instruments, interest rate   0.50%      
Working Capital Facility [Member] | U.S. dollar [Member] | Eurocurrency Rate [Member]          
Debt Instrument [Line Items]          
Debt instruments, interest rate   1.00%      
Working Capital Facility [Member] | Canadian Dollars [Member]          
Debt Instrument [Line Items]          
Debt instruments, interest rate description   For the Canadian dollar working capital facility, the alternate rate is the Prime Rate which is the higher of (a) the Canadian Prime Rate as in effect from time to time and (b) the one-month Eurocurrency Rate for U.S. dollars as in effect from time to time plus 1.00%.      
Working Capital Facility [Member] | Canadian Dollars [Member] | Eurocurrency Rate [Member]          
Debt Instrument [Line Items]          
Debt instruments, interest rate   1.00%      
Working Capital Facility [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Line of credit facility, accordion feature, increase limit $ 200,000,000.0        
Credit Agreement [Member] | One Month London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Variable interest rate periods   1 month      
Credit Agreement [Member] | Two Month London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Variable interest rate periods   2 months      
Credit Agreement [Member] | Three Month London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Variable interest rate periods   3 months      
Credit Agreement [Member] | Six Month London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Variable interest rate periods   6 months      
Credit Agreement [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Line of credit facility, accordion feature, increase limit 200,000,000.0        
Credit Agreement [Member]          
Debt Instrument [Line Items]          
Debt instruments, interest rate description   Borrowings under this agreement bore interest based on LIBOR, plus a specified margin, which was a function of the utilization of this agreement for the working capital facility and leverage ratio for the acquisition facility.      
Debt instruments, weighted average interest rate   2.90%     2.80%
Credit Agreement [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Debt instruments, maturity date   Dec. 09, 2019      
Credit Agreement [Member] | Working Capital Facility [Member]          
Debt Instrument [Line Items]          
Borrowings under credit agreement   $ 332,500,000     $ 503,200,000
Letters of credit outstanding   23,600,000     120,200,000
Borrowing base under credit agreement   542,600,000     843,300,000
Excess availability under credit agreement   186,500,000      
Credit Agreement [Member] | Working Capital Facility [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Debt instruments, borrowing capacity 1,000,000,000        
Credit Agreement [Member] | Acquisition Credit Facility [Member]          
Debt Instrument [Line Items]          
Borrowings under credit agreement   283,400,000     $ 311,600,000
Excess availability under credit agreement   $ 116,600,000      
Credit Agreement [Member] | Acquisition Credit Facility [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Debt instruments, borrowing capacity 400,000,000        
Kildair [Member] | Credit Agreement [Member] | Working Capital Facility [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Debt instruments, borrowing capacity $ 120,000,000        
Subsequent Event [Member] | Credit Agreement [Member] | Debt Instrument Amended And Restated [Member]          
Debt Instrument [Line Items]          
Debt instruments, borrowing capacity     $ 550,000,000.0 $ 400,000,000.0