XML 77 R55.htm IDEA: XBRL DOCUMENT v3.8.0.1
Debt - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Apr. 12, 2017
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Apr. 11, 2017
Debt Instrument [Line Items]            
Cash payment for debt redemption     $ 0 $ 0 $ 591,000  
Debt instrument discount     600,000      
Revolving Credit Facility            
Debt Instrument [Line Items]            
Debt instrument fee     900,000 100,000    
Term Loan Facility | Line of Credit            
Debt Instrument [Line Items]            
Revolving credit facility $ 175,000,000          
Term Loan Facility | Secured Debt            
Debt Instrument [Line Items]            
Accrued interest     100,000      
Debt instrument fee     2,800,000      
Debt instrument discount     3,000,000      
Carrying Amount     $ 166,949,000 0    
Weighted average interest rate (as a percent)     7.22%      
Quarterly debt principal payment     $ 1,100,000      
Prepayment penalty (as a percent)     1.00%      
Term Loan Facility | Base Rate Loans | Secured Debt            
Debt Instrument [Line Items]            
Basis spread (as a percent)     5.00%      
Term Loan Facility | LIBOR Revolver Loans | Secured Debt            
Debt Instrument [Line Items]            
Basis spread (as a percent)     6.00%      
Term Loan Facility | LIBOR Revolver Loans | Secured Debt | Minimum            
Debt Instrument [Line Items]            
Basis spread (as a percent)     1.00%      
7.875% senior secured notes due April 15, 2019 | Senior Notes            
Debt Instrument [Line Items]            
Cash payment for debt redemption $ 74,000,000          
Interest on Senior Secured Notes (as a percent) 7.875%   7.875%      
Write off of deferred financing fees   $ 1,600,000        
Interest costs   $ 1,500,000        
Carrying Amount     $ 0 233,154,000    
Third ARLS Agreement | Line of Credit | Revolving Credit Facility            
Debt Instrument [Line Items]            
Revolving credit facility $ 65,000,000         $ 40,000,000
Availability of borrowing     $ 58,600,000      
Commitment fee (as a percent)     0.25%      
Third ARLS Agreement | Line of Credit | Letter of Credit            
Debt Instrument [Line Items]            
Revolving credit facility 10,000,000.0          
Outstanding borrowings     $ 2,100,000 $ 2,500,000    
Borrowing availability maintenance amount $ 5,000,000          
Borrowing availability maintenance (as a percent) 10.00%          
Fixed charge coverage ratio 100.00%          
Borrowing availability compliance threshold period     60 days