Restructuring and Related Activities - Restructuring Charges by Segment (Details) - USD ($)
$ in Millions |
3 Months Ended |
Mar. 31, 2018 |
Mar. 31, 2017 |
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
$ 0.4
|
$ 0.6
|
| Restructuring and Related Cost, Incurred Cost |
0.4
|
|
| Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
0.4
|
4.9
|
| Severance Pay and Benefits |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring and Related Cost, Incurred Cost |
0.4
|
|
| Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring and Related Cost, Incurred Cost |
0.0
|
|
| Operating Segments | Audio | Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
0.3
|
4.7
|
| Operating Segments | Precision Devices | Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
0.1
|
0.1
|
| Corporate | Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
0.0
|
0.1
|
| Cost of Goods Sold, Restructuring Charges | Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
|
4.3
|
| Operating Expense | Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
$ 0.4
|
|
| Restructuring Charges [Member] | Severance Pay and Contract Termination and Other Costs |
|
|
| Restructuring Cost and Reserve |
|
|
| Restructuring charges |
|
$ 0.6
|