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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
-Paragraph 1
-Subparagraph (a)(3)
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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 55
-Paragraph 37
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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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Note 3. Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Apr. 30, 2015	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Goodwill			$ 5,703	$ 0
GAF Acquiree Member
Goodwill	$ 5,703
Goodwill, Acquired During Period	5,703
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	5,500
GAF Acquiree Member \| Trademarks
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		8 years
GAF Acquiree Member \| Customer Relationships
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 4,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		9 years