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Other Income (Loss), Net - Schedule of Other Income (Loss) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Long Lived Assets Held-for-sale [Line Items] |  |  |
Interest income | $ 2,827 | $ 1,525 | $ 1,822
Gain on asset dispositions, net | 593 | 1,724 | 2,094
Other, net | 710 | 836 | (1,101)
Disposal of non-core product lines | 0 | (4,223) | 0
Impairment of intangible assets | 0 | (723) | 0
Land impairment loss | 0 | 0 | (50)
Total other income (loss), net | 4,130 | (861) | $ 2,765
Safety Works |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |
Impairment of intangible assets | (700) |  |
Property in Australia |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |
Gain on asset dispositions, net | 2,000 |  |
Detector Tube Assets |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |
Gain on asset dispositions, net |  | $ 2,200 |
Americas | Safety Works |  |  |
Long Lived Assets Held-for-sale [Line Items] |  |  |
Disposal of non-core product lines | $ (4,200) |  |

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