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Debt and Other Financing Arrangements - Credit Agreement (effective 2017) (Details)
3 Months Ended 12 Months Ended
Oct. 02, 2017
USD ($)
Jun. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2013
USD ($)
Line of Credit Facility [Line Items]            
Credit agreement term       5 years    
Line of Credit Facility, Maximum Borrowing Capacity $ 200,000,000          
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.50%      
Line of Credit Facility, Commitment Fee Percentage     0.375%      
Line Of Credit Facility, Fronting Fee Percentage     0.125%      
Long-term Line of Credit     $ 18,000,000 $ 0    
Borrowing capacity     $ 182,000,000      
Minimum consolidated interest coverage ratio     1.50      
Loss (Gain) on Extinguishment of Debt   $ 1,300,000 $ 1,300,000 $ 3,200,000 $ 19,000,000  
Equity Interests in Foreign Subsidiaries     66.00%      
Standby Letters of Credit [Member]            
Line of Credit Facility [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity 30,000,000          
Bridge Loan [Member]            
Line of Credit Facility [Line Items]            
Line of Credit Facility, Maximum Borrowing Capacity 25,000,000          
Tranche B Term Loan due 2024 [Member]            
Line of Credit Facility [Line Items]            
Credit agreement term       7 years    
Debt Instrument, Face Amount 600,000,000          
Proceeds from Issuance of Debt 577,000,000          
Tranche B Term Loan due 2020 [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Face Amount $ 315,800,000         $ 540,000,000
London Interbank Offered Rate (LIBOR) [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 3.75%   3.25%      
Debt Instrument, Basis Spread on Variable Rate     1.00%   1.00%  
Federal Funds Rate [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Basis Spread on Variable Rate         0.50%  
Federal Funds Rate [Member] | Tranche B Term Loan due 2024 [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Basis Spread on Variable Rate     0.50%      
Base Rate [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 2.75%   2.25%      
Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage     1.00%   3.00%  
Minimum [Member] | Base Rate [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage         2.00%  
Maximum [Member]            
Line of Credit Facility [Line Items]            
Leverage Ratio, threshold     3.25      
Maximum [Member] | Revolving Credit Facility [Member]            
Line of Credit Facility [Line Items]            
Leverage Ratio, threshold     3.50      
Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage         3.50%  
Maximum [Member] | Base Rate [Member]            
Line of Credit Facility [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage         2.50%