The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Section 45

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-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

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- Definition

Fair value portion of investments accounted under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 25

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- Definition

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

-Section 04

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Investments Equity Method Investments (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 23, 2013	May 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Carrying Value	$ 30,060us-gaap_EquityMethodInvestments	$ 8,339us-gaap_EquityMethodInvestments
Income (Loss) Recognized	(6,070)	(862)	0
Fair value of equity-method investment	24,355
iGo
Schedule of Available-for-sale Securities [Line Items]
Ownership	46.90%			44.70%
API
Schedule of Available-for-sale Securities [Line Items]
Ownership					20.60%
Traditional equity method \| Again Faster
Schedule of Available-for-sale Securities [Line Items]
Ownership	40.00%	40.00%
Carrying Value	3,105	3,671
Income (Loss) Recognized	(566)	(329)
Fair value of equity-method investment	3,400
Traditional equity method \| iGo
Schedule of Available-for-sale Securities [Line Items]
Ownership	46.90%	44.70%
Carrying Value	2,600	4,668
Income (Loss) Recognized	(2,068)	(533)
Fair value option \| API
Schedule of Available-for-sale Securities [Line Items]
Ownership	20.60%
Carrying Value	24,355	0
Income (Loss) Recognized	$ (3,436)	$ 0