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Long-term Debt and Financing Arrangements - Narrative (Details)
9 Months Ended
Aug. 31, 2018
USD ($)
Sep. 30, 2019
USD ($)
Dec. 31, 2018
Aug. 30, 2018
USD ($)
Jul. 06, 2016
USD ($)
Debt Instrument [Line Items]          
Weighted-average interest rate (as a percent)   4.30% 3.40%    
Amended Credit Facility          
Debt Instrument [Line Items]          
Borrowings outstanding under term loan $ 250,000,000        
Outstanding standby letters of credit   $ 1,900,000      
Term Loan Due August 31, 2023          
Debt Instrument [Line Items]          
Borrowings outstanding under term loan 200,000,000 149,000,000.0      
Amount of quarterly repayments of term commitment 2,500,000        
Debt issuance costs   $ 400,000      
Revolving Credit Facility | Amended Credit Facility          
Debt Instrument [Line Items]          
Maximum borrowing capacity 450,000,000     $ 175,000,000 $ 450,000,000
Maximum borrowing capacity possible value of increase (not to exceed) $ 150,000,000        
Credit facility fixed charge coverage ratio (not less than)   1.25      
Required consolidated leverage ratio as of end of each fiscal quarter (no greater than)   3.5      
Remaining borrowing capacity   $ 110,100,000      
Outstanding borrowings   $ 287,000,000.0      
Revolving Credit Facility | Amended Credit Facility | Minimum          
Debt Instrument [Line Items]          
Quarterly unused line commitment fee (as a percent)   0.15%      
Revolving Credit Facility | Amended Credit Facility | Maximum          
Debt Instrument [Line Items]          
Quarterly unused line commitment fee (as a percent)   0.275%      
Revolving Credit Facility | Amended Credit Facility | Base Rate | Minimum          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   0.00%      
Revolving Credit Facility | Amended Credit Facility | Base Rate | Maximum          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   1.25%      
Revolving Credit Facility | Amended Credit Facility | Federal Funds Effective Swap Rate          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   0.50%      
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   1.00%      
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate | Minimum          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   0.75%      
Revolving Credit Facility | Amended Credit Facility | Eurocurrency Rate | Maximum          
Debt Instrument [Line Items]          
Basis spread on variable rate (as a percent)   2.00%      
Foreign Credit Facility          
Debt Instrument [Line Items]          
Remaining borrowing capacity   $ 6,800,000      
Outstanding borrowings   100,000      
Outstanding standby letters of credit   $ 2,300,000