Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Prior Term Loan B and Revolving Credit Facility - Additional Information (Detail)

v3.19.1
Long-Term Debt - Prior Term Loan B and Revolving Credit Facility - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
May 19, 2017
Jan. 30, 2017
Feb. 28, 2017
Dec. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]          
Interest expense, debt         $ 203,000
Gains (losses) on extinguishment of debt, total   $ (4,500)   $ 648,000 (2,775,000)
Debt instrument, interest rate, stated percentage       4.58%  
Amortization of financing costs   $ 12,000 $ 18,000 $ 1,114,000 940,000
Term Loan B [Member]          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity       300,000,000  
Senior notes, non-current       298,500,000  
Interest expense, debt         74,000
Gains (losses) on extinguishment of debt, total     $ (6,200)    
Debt instrument, unamortized discount $ 600,000        
Term Loan B [Member] | Abl Facility [Member]          
Debt Instrument [Line Items]          
Long-term debt, gross 258,000,000        
Revolver [Member]          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity       $ 25,000,000  
Amortization of financing costs         $ 26,000
Revolver [Member] | Abl Facility [Member]          
Debt Instrument [Line Items]          
Long-term line of credit, non-current 4,100,000        
Gains (losses) on extinguishment of debt, total (2,100,000)        
Term Loan B and Revolver [Member]          
Debt Instrument [Line Items]          
Unamortized debt issuance expense $ 1,500,000