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Business Combinations - Narrative (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Apr. 06, 2017 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($)
Business Acquisition [Line Items] |  |  |  |
Cash consideration |  | $ 0 | $ 8,894 | $ 0
Additional earnout payments |  | 1,600 |  |
Long-term contingent consideration |  | 8,435 | 13,400 |
Residential Control Systems, Inc |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Purchase price | $ 12,600 |  |  |
Cash consideration | 8,894 |  |  |
Contingent consideration | 3,700 |  |  |
Acquisition costs |  | 100 | 100 |
Net sales since acquisition date |  | 5,100 | 3,500 |
Net loss since acquisition date |  | 200 | 400 |
Additional earnout payments | $ 10,000 |  |  |
Increase (decrease) in amortization expense, net |  | 38 | 25 |
Residential Control Systems, Inc | Long-term Contingent Consideration |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Long-term contingent consideration |  | $ 700 | $ 2,300 |
Residential Control Systems, Inc | Discount Rate | Income Approach Valuation Technique |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Measurement input for contingent consideration liability | 0.248 |  |  |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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