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Investments - Equity Method Investments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Aug. 23, 2013
Schedule of Equity Method Investments [Line Items]
Carrying Value	$ 6,906		$ 8,339
Income (Loss) Recognized	(1,433)	0
Again Faster
Schedule of Equity Method Investments [Line Items]
Ownership	40.00%		40.00%
Carrying Value	3,542		3,671
Income (Loss) Recognized	(129)	0
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Schedule of Equity Method Investments [Line Items]
Ownership	44.70%		44.70%	44.70%
Carrying Value	3,364		4,668
Income (Loss) Recognized	$ (1,304)	$ 0

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.

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