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Borrowing Arrangements - Schedule of Outstanding Borrowings (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Sale and leaseback financing obligation $ 18,626 $ 18,518
Finance lease liabilities 1,485 1,199
Outstanding borrowings 77,317 77,609
Debt – current portion (19,256) (45,728)
Long-term debt 58,061 31,881
Revolving Credit and Security Agreement [Member]    
Debt Instrument [Line Items]    
Long term debt 40,037 14,320
Promissory Notes (and Interest) [Member]    
Debt Instrument [Line Items]    
Long term debt 0 26,205
Industrial Revenue Bonds ("IRB") [Member]    
Debt Instrument [Line Items]    
Long term debt 13,311 13,311
Minority Shareholder Loan [Member]    
Debt Instrument [Line Items]    
Long term debt $ 3,858 $ 4,056