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Restructuring (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Restructuring Reserve | $ 0.4 |  |  |  | $ 0.4 | $ 0.0 | $ 0.0
Restructuring Charges | $ 0.1 | $ 0.3 | $ 1.2 | $ 0.4 | 1.7 | 0.4 | $ 0.0
Payments for Restructuring |  |  |  |  | (1.3) | (0.4) |
Operating Segments [Member] | Safety And Security Systems [Member] | Voluntary Reduction-In-Force Plan [Member] |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |
Severance Costs |  |  |  |  | $ 1.7 | $ 0.4 |

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