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Disposed and Discontinued Operations (Details) - USD ($)
 3 Months Ended 12 Months Ended
Jul. 07, 2016
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Nov. 28, 2017
Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from the sale of business     $ 10,000,000.0 $ 123,100,000 $ 40,600,000    
Gain (Loss) on Disposition of Business     (1,600,000) (62,300,000) 25,600,000    
Impairment of intangible assets       16,200,000      
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents     0 0 2,800,000   $ 2,000,000.0
Disposal Group, Including Discontinued Operation, Assets     0 1,700,000      
Disposal Group, Including Discontinued Operation, Liabilities     0 5,600,000      
Discontinued Operations, Disposed of by Sale [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Disposal Group, Including Discontinued Operation, Revenue     0 92,200,000 156,400,000    
Disposal Group, Including Discontinued Operation, Costs of Goods Sold     0 61,500,000 136,100,000    
Disposal Group, Including Discontinued Operation, Impairment of Long-Lived Assets     0 400,000 400,000    
Disposal Group, Including Discontinued Operation, Cost of Goods Sold, Restructuring Charges     0 100,000 8,900,000    
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)     0 30,200,000 11,000,000.0    
Disposal Group, Including Discontinued Operation, Research and Development Expense     0 7,700,000 15,100,000    
Disposal Group, Including Discontinued Operation, General and Administrative Expense     0 18,500,000 26,900,000    
Disposal Group, Including Discontinued Operation, Restructuring Charges     0 200,000 3,400,000    
Disposal Group, Including Discontinued Operation, Operating Expense     0 26,400,000 45,400,000    
Disposal Group, Including Discontinued Operation, Other Expense       1,300,000      
Disposal Group, Including Discontinued Operation, Other Income     (200,000)   (900,000)    
Gain (Loss) on Disposition of Business     (1,600,000) (62,300,000) 25,600,000    
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax     1,800,000 64,800,000 (59,100,000)    
Discontinued Operation, Tax Effect of Discontinued Operation     (300,000) 3,000,000.0 3,000,000.0    
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax     2,100,000 61,800,000 (62,100,000)    
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net       1,200,000      
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets, Current       500,000      
Disposal Group, Including Discontinued Operation, Assets, Current       1,700,000      
Disposal Group, Including Discontinued Operation, Assets       1,700,000      
Disposal Group, Including Discontinued Operation, Accounts Payable, Current       100,000      
Disposal Group, Including Discontinued Operation, Other Liabilities, Current       5,500,000      
Disposal Group, Including Discontinued Operation, Liabilities, Current       5,600,000      
Disposal Group, Including Discontinued Operation, Liabilities       5,600,000      
Depreciation, Discontinued Operations       2,300,000 3,300,000    
Amortization of intangible Assets, Discontinued Operations       1,200,000 1,400,000    
Capital Expenditure, Discontinued Operations       2,100,000 6,500,000    
Timing Device Business [Member] | Precision Devices | Discontinued Operations, Disposed of by Sale [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax     400,000        
ProceedsPurchasePriceAdjustment   $ 1,800,000          
Proceeds from the sale of business     135,100,000        
Disposal Group, Including Discontinued Operation, Consideration           $ 130,000,000.0  
Speaker and Receiver Product Line | Discontinued Operations, Disposed of by Sale [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax       26,900,000      
Proceeds from the sale of business $ 40,600,000            
Disposal Group, Including Discontinued Operation, Consideration $ 45,000,000.0            
Gain (Loss) on Disposition of Business       $ 25,600,000      
Prepaid Expenses and Other Current Assets [Member] | Timing Device Business [Member] | Precision Devices              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Proceeds from the sale of business   $ 10,000,000.0          
Accounts Payable [Member] | Discontinued Operations, Disposed of by Sale [Member]              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Capital Expenditure, Discontinued Operations     $ 0   $ 100,000