Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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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.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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Acquisitions Details (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
Acquisitions Details (Details) - USD ($) $ in Thousands	Dec. 13, 2019	Jun. 30, 2020	Sep. 30, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Change in fair value of contingent consideration				$ (128)	$ 810
Operating lease right-of-use asset				15,036
Operating lease liability				16,882
Opengear
Business Acquisition [Line Items]
Cash paid at closing	$ 148,058
Weighted average useful life identifiable intangibles	13 years 4 months 24 days
Opengear \| General and Administrative
Business Acquisition [Line Items]
Acquisition costs			$ 300	2,100
Earn-Out Payments \| Maximum \| Opengear
Business Acquisition [Line Items]
Earn-out payment maximum							$ 5,000
Earn-Out Payments \| Maximum \| Forecast \| Opengear
Business Acquisition [Line Items]
Earn-out payment maximum						$ 10,000
Customer Relationships \| Opengear
Business Acquisition [Line Items]
Useful life identifiable intangibles	14 years 6 months
Purchased and Core Technology \| Opengear
Business Acquisition [Line Items]
Useful life identifiable intangibles	9 years
Trademarks \| Opengear
Business Acquisition [Line Items]
Useful life identifiable intangibles	12 years
Other non-current assets \| Opengear
Business Acquisition [Line Items]
Operating lease right-of-use asset	$ 1,400
Other current and non-current liabilities \| Opengear
Business Acquisition [Line Items]
Operating lease liability	1,700
Contingent Consideration \| Forecast \| Opengear
Business Acquisition [Line Items]
Change in fair value of contingent consideration		$ 900
Estimate of Fair Value Measurement \| Fair Value, Measurements, Recurring \| Contingent Consideration
Business Acquisition [Line Items]
Contingent consideration fair value			$ 5,407	10,379
Estimate of Fair Value Measurement \| Fair Value, Measurements, Recurring \| Contingent Consideration \| Opengear
Business Acquisition [Line Items]
Contingent consideration fair value	$ 5,100
Estimate of Fair Value Measurement \| Fair Value, Measurements, Recurring \| Contingent Consideration \| Earn-Out Payments \| Opengear
Business Acquisition [Line Items]
Contingent consideration fair value				$ 5,100