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Contingencies - Additional Information (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 08, 2017
USD ($)
Feb. 09, 2017
USD ($)
Oct. 06, 2016
USD ($)
policy
Aug. 31, 2017
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
LegalMatter
Mar. 31, 2018
USD ($)
LegalMatter
Mar. 31, 2018
USD ($)
LegalMatter
Mar. 31, 2018
USD ($)
LegalMatter
Vendor
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
LegalMatter
Dec. 31, 2010
policy
Dec. 31, 2009
policy
Dec. 31, 2016
USD ($)
LegalMatter
Loss Contingencies [Line Items]                            
Product Warranty Expense               $ 2,600,000   $ 3,600,000        
Loss contingency, years of activity           5 years                
Number of insurance carriers             3   20          
Insurance receivables           $ 131,400,000 $ 131,400,000 131,400,000 $ 131,400,000   $ 134,700,000     $ 159,900,000
Insurance receivables, current           13,000,000 13,000,000 13,000,000 13,000,000   11,600,000      
Insurance receivables, noncurrent           118,400,000 118,400,000 118,400,000 118,400,000   123,100,000      
Notes receivable from insurance companies           63,400,000 63,400,000 63,400,000 63,400,000   76,900,000     $ 67,300,000
Notes receivable from insurance companies, current           3,463,000 3,463,000 3,463,000 3,463,000   17,333,000      
Notes Receivables from Insurance Companies, Noncurrent           59,900,000 59,900,000 59,900,000 59,900,000          
Notes receivable from insurance companies, noncurrent           59,954,000 59,954,000 59,954,000 59,954,000   59,567,000      
Attorneys' fees   $ 11,800,000                        
Payment received pursuant to insurance policies $ 80,900,000                          
Single Incident                            
Loss Contingencies [Line Items]                            
Product liability accrual           $ 5,300,000 $ 5,300,000 5,300,000 $ 5,300,000   $ 5,400,000      
Product liability expense               $ 300,000            
Lawsuit                            
Loss Contingencies [Line Items]                            
Number of lawsuits | LegalMatter           1,453 1,453 1,453 1,453   1,420     1,794
Damages from Product Defects                            
Loss Contingencies [Line Items]                            
Number of lawsuits | LegalMatter           2,311 2,311 2,311 2,311   2,242     3,023
Unasserted Claim                            
Loss Contingencies [Line Items]                            
Product liability accrual           $ 108,800,000 $ 108,800,000 $ 108,800,000 $ 108,800,000   $ 111,100,000      
Cumulative Trauma                            
Loss Contingencies [Line Items]                            
Product liability accrual           179,000,000 179,000,000 179,000,000 179,000,000   181,100,000      
Product liability expense               3,200,000   $ 1,700,000        
Cumulative Trauma, Reported Claims                            
Loss Contingencies [Line Items]                            
Product liability accrual           70,200,000 70,200,000 70,200,000 70,200,000   70,000,000      
Claims Settled, But Not Yet Paid                            
Loss Contingencies [Line Items]                            
Product liability accrual           54,700,000 54,700,000 54,700,000 54,700,000   54,500,000      
Claims Asserted But Not Yet Resolved                            
Loss Contingencies [Line Items]                            
Product liability accrual           15,500,000 15,500,000 15,500,000 15,500,000   15,500,000      
Uninsured Cumulative Trauma                            
Loss Contingencies [Line Items]                            
Product liability expense               2,800,000            
Other Current Liabilities | Cumulative Trauma                            
Loss Contingencies [Line Items]                            
Product liability accrual           56,000,000 56,000,000 56,000,000 56,000,000   48,600,000      
Other Noncurrent Liabilities | Cumulative Trauma                            
Loss Contingencies [Line Items]                            
Product liability accrual           123,000,000 123,000,000 123,000,000 123,000,000   21,400,000      
North River Insurance Company                            
Loss Contingencies [Line Items]                            
Gain contingency, number of policies allegedly breached | policy     3                 3 1  
Litigation Settlement, Amount Awarded from Other Party     $ 10,900,000                      
Damages awarded   46,900,000                        
Attorneys' fees                     2,000,000      
Pre-judgment interest   5,100,000                        
North River Insurance Company | Punitive Damages                            
Loss Contingencies [Line Items]                            
Damages awarded   $ 30,000,000                        
Settled Litigation                            
Loss Contingencies [Line Items]                            
Payments to resolve cumulative trauma claims                     $ 25,200,000      
Insurance receivables           $ 51,000,000 $ 51,000,000 $ 51,000,000 $ 51,000,000          
Damages awarded       $ 75,200,000                    
Subsequent Event | Settled Litigation | Scenario, Forecast                            
Loss Contingencies [Line Items]                            
Loss Contingency Accrual, Payments         $ 14,200,000                  
Loss Contingency Accrual, Number of Periodic Payments         5