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Commitments and Contingencies (Textuals) (Details) ft² in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Mar. 22, 2013 USD ($) ft² | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Oct. 31, 2016 USD ($) | Oct. 31, 2016 RUB (₽)
Loss Contingencies [Line Items] |  |  |  |  |  |
Probable liability accrued |  | $ 9,700,000 |  |  |  |
Accrued asbestos reserves |  | 9,700,000 | $ 8,500,000 |  |  |
Number of years of lease of corporate headquarters | 6 years |  |  |  |  |
Area of leased office building (in square feet) | ft² | 192 |  |  |  |  |
Purchase price of property at end of lease term | $ 41,200,000.0 |  |  |  |  |
Percentage of lease balance as final payment end of lease term | 86.00% |  |  |  |  |
Debt covenant, debt not paid when due | $ 75,000,000 |  |  |  |  |
Expense for known and future asbestos-related litigation |  | 4,000,000 | $ 3,500,000 | $ 6,300,000 |  |
Maximum [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Accrued asbestos reserves |  | 34,600,000 |  |  |  |
Minimum [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Accrued asbestos reserves |  | 19,300,000 |  |  |  |
Unfavorable Regulatory Action [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Alleged payment |  |  |  |  | $ 475 |
Other Noncurrent Liabilities [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Accrued asbestos reserves |  | $ 19,300,000 |  |  |  |
Russia, Rubles | Unfavorable Regulatory Action [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Alleged payment | ₽ |  |  |  |  |  | ₽ 30,000

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- Definition debt instrument, Covenant for debt not paid + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of reserves for the costs of settling insured claims and costs incurred in the claims settlement process attributable to asbestos and environmental claims, before estimated recoveries from reinsurers. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (cc) -URI http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437 + Details
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