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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 |  |  |  |  |  |  |  |  |

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