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Acquisitions - Additional Information (Details) ZAR / shares in Units, $ in Thousands, shares in Millions |  |  |  |  |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 29, 2016 USD ($) | Sep. 21, 2016 USD ($) | Apr. 11, 2016 USD ($) | Jan. 05, 2016 installment shares | Oct. 05, 2015 USD ($) | Jun. 18, 2015 ZAR ZAR / shares | Mar. 27, 2015 USD ($) | Dec. 31, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Non-cash change in acquisition-related escrow |  |  |  |  |  |  |  |  |  |  | $ 0 | $ (8,286) | $ 0
Acquisition-related earn out |  |  |  |  |  |  |  |  | $ 5,274 |  | 7,912 | 5,274 |
Impairment of purchased intangible assets |  |  |  |  |  |  |  |  |  |  | 2,594 | 0 | 0
Proceeds related to recent or pending divestitures |  | $ 50,000 |  |  |  |  |  |  |  |  | 11,300 | 0 | $ 0
Gain recognized during the period |  |  |  |  |  |  |  |  |  |  | 5,000 |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase consideration for recent or pending divestitures | $ 11,700 |  | $ 11,000 |  |  |  |  |  |  |  |  |  |
Proceeds related to recent or pending divestitures | 11,300 |  | 9,000 |  |  |  |  |  |  |  |  |  |
Other receivables | 2,100 |  |  |  |  |  |  |  |  |  |  |  |
Liabilities settled | $ 400 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of remaining hardware and related assets due to Telit |  |  |  |  |  |  |  |  |  |  | 500 |  |
Certain Transition Services |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |
Contingent consideration payout period |  |  | 2 years |  |  |  |  |  |  |  |  |  |
Satisfaction Of Certain Conditions |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |
Purchase Of Module Product Inventory |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  | 3,800 |  |  |  |  |  |  |  |  |  |
Purchase Of Module Product Inventory - Certain Transition Services |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |
Contingent consideration payout period |  |  | 2 years |  |  |  |  |  |  |  |  |  |
DigiCore/Ctrack |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Voting interests acquired |  |  |  |  |  | 100.00% |  |  |  |  |  |  |
Acquisition share price (Rand per share) | ZAR / shares |  |  |  |  |  | ZAR 4.40 |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  |  |  | 79,365 |  |  |  |
Non-cash change in acquisition-related escrow |  |  |  |  |  |  |  |  |  |  |  | (8,300) |
Total purchase price |  |  |  |  | $ 80,000 |  |  |  | 79,988 |  |  |  |
Equity consideration |  |  |  |  |  |  |  |  | $ 623 |  |  |  |
Accrued and other liabilities |  |  |  |  | $ 15,018 |  |  |  |  |  |  |  |
DigiCore/Ctrack | General and administrative expense |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition costs |  |  |  |  |  |  |  |  |  |  |  | 1,700 |
FW |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration |  |  |  |  |  |  | $ 9,300 |  |  | $ 9,268 |  |  |
Total purchase price |  |  |  |  |  |  | 24,800 |  |  | 24,777 |  |  |
Purchase consideration placed in escrow fund |  |  |  |  |  |  | 1,500 |  |  |  |  |  |
Other assumed liabilities |  |  |  |  |  |  | 500 |  |  | 509 |  |  |
Equity consideration |  |  |  |  |  |  | 15,000 |  |  | $ 15,000 |  |  |
Maximum contingent consideration |  |  |  |  |  |  | 25,000 |  |  |  |  |  |
Number of cash installments | installment |  |  |  | 5 |  |  |  |  |  |  |  |  |
Period for cash installments |  |  |  | 4 years |  |  |  |  |  |  |  |  |
Issuable to former shareholders (shares) | shares |  |  |  | 2.9 |  |  |  |  |  |  |  |  |
Number of share installments | installment |  |  |  | 3 |  |  |  |  |  |  |  |  |
Period for share installments |  |  |  | 3 years |  |  |  |  |  |  |  |  |
Contingent liability expense |  |  |  |  |  |  |  |  |  |  | 7,900 |  |
Acquisition-related earn out |  |  |  |  |  |  |  |  |  |  | 14,000 |  |
Accrued and other liabilities |  |  |  |  |  |  | $ 1,916 | [1] |  |  | 200 |  |
Measurement-period adjustment to goodwill |  |  |  |  |  |  |  |  |  |  | 195 |  |
FW | Developed technologies |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment of purchased intangible assets |  |  |  |  |  |  |  |  |  |  | 2,600 |  |
FW | General and administrative expense |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition costs |  |  |  |  |  |  |  |  |  |  |  | $ 900 |
Other Liabilities | FW |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition-related earn out |  |  |  |  |  |  |  |  |  |  | $ 12,500 |  |
Scenario, Plan | Maximum | DigiCore/Ctrack |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration | ZAR |  |  |  |  |  | ZAR 1,094,223,363 |  |  |  |  |  |  |
[1] | Reflects measurement-period adjustments recorded by the Company in accordance with ASU 2015-16. During the year ended December 31, 2016, the Company recorded a measurement-period adjustment to the allocation of fair value resulting in a $0.2 million increase to accrued and other liabilities and a corresponding $0.2 million increase to goodwill.

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