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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+ References

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- Definition

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

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Acquisitions (Schedule of Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	Aug. 30, 2019	Aug. 21, 2018	Feb. 22, 2017
Apeks
Business Acquisition [Line Items]
Fair Value	$ 3,400
Apeks \| Trademarks
Business Acquisition [Line Items]
Indefinite-lived Intangible Assets Acquired	1,900
Apeks \| Technology
Business Acquisition [Line Items]
Fair Value	$ 900
Estimated Useful Life	7 years
Apeks \| Customer relationships
Business Acquisition [Line Items]
Fair Value	$ 600
Estimated Useful Life	6 years
SolarBOS
Business Acquisition [Line Items]
Fair Value		$ 1,450
SolarBOS \| Trademarks
Business Acquisition [Line Items]
Fair Value		$ 300
Estimated Useful Life		3 years
SolarBOS \| Technology
Business Acquisition [Line Items]
Fair Value		$ 450
Estimated Useful Life		9 years
SolarBOS \| Customer relationships
Business Acquisition [Line Items]
Fair Value		$ 700
Estimated Useful Life		9 years
Package Concierge
Business Acquisition [Line Items]
Fair Value			$ 3,600
Package Concierge \| Trademarks
Business Acquisition [Line Items]
Fair Value			600
Package Concierge \| Technology
Business Acquisition [Line Items]
Fair Value			$ 1,300
Estimated Useful Life			10 years
Package Concierge \| Customer relationships
Business Acquisition [Line Items]
Fair Value			$ 1,700
Estimated Useful Life			7 years