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Accounts Payable and Accrued Liabilities - Narrative (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]    
Trade accounts payable $ 183,663 $ 228,059
Accrued wages, salaries and employee benefits 37,275 41,426
Total lease liability, current 13,777 0
Accrued account purchase agreement liabilities 16,889 4,885
Accrued discounts and allowances 7,458 8,143
Accrued taxes other than income taxes payable 10,723 6,243
Accrued utilities 6,923 6,934
Accrued interest 15,824 14,672
Other 8,762 10,670
Accounts payable and accrued liabilities $ 301,294 $ 321,032