Investments (Tables)

6 Months Ended

Jun. 30, 2014

Investments [Abstract]

Investments

Marketable securities at June 30, 2014, consisted of the following:

	Cost			Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Short-term deposits	$	74,935		$	—	$	—		$	74,935
Mutual funds	15,722			6,012		—			21,734
Corporate securities	89,743			15,611		(3,714		)	101,640
Corporate obligations	32,374			1,534		(19		)	33,889
Total available-for-sale securities	212,774			23,157		(3,733		)	232,198
Amounts classified as cash equivalents	(74,935		)	—		—			(74,935		)
Amounts classified as marketable securities	$	137,839		$	23,157	$	(3,733	)	$	157,263

Marketable securities at December 31, 2013, consisted of the following:

	Cost			Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
	(in thousands)
Short-term deposits	$	60,909		$	—	$	—		$	60,909
Mutual funds	15,722			5,061		—			20,783
United States government securities	50,356			23		—			50,379
Corporate securities	69,806			9,961		(5,208		)	74,559
Corporate obligations	31,356			885		(276		)	31,965
Commercial paper	1,799			—		—			1,799
Total available-for-sale securities	229,948			15,930		(5,484		)	240,394
Amounts classified as cash equivalents	(61,909		)	—		—			(61,909		)
Amounts classified as marketable securities	$	168,039		$	15,930	$	(5,484	)	$	178,485

Available-for-sale Securities

Gross realized gains and losses from sales of marketable securities, all of which are reported as a component of "Other income (expense), net" in the consolidated statements of operations for the three and six months ended June 30, 2014 and 2013, were as follows:

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
	(in thousands)
Gross realized gains	$	3,196		$	2,607		$	6,396		$	3,865
Gross realized losses	(1,120		)	(3,852		)	(1,329		)	(3,894		)
Realized gains (losses), net	$	2,076		$	(1,245	)	$	5,067		$	(29	)

Schedule of Unrealized Loss on Investments

The fair value of the Company’s marketable securities with unrealized losses at June 30, 2014, and the duration of time that such losses had been unrealized, were as follows:

	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
Corporate securities	$	19,244	$	(3,481	)	$	199	$	(233	)	$	19,443	$	(3,714	)
Corporate obligations	6,019		(19		)	—		—			6,019		(19		)
Total	$	25,263	$	(3,500	)	$	199	$	(233	)	$	25,462	$	(3,733	)

The fair value of the Company’s marketable securities with unrealized losses at December 31, 2013, and the duration of time that such losses had been unrealized, were as follows:

	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses			Fair Value		Gross Unrealized Losses
	(in thousands)
Corporate securities	$	15,609	$	(4,757	)	$	803	$	(451	)	$	16,412	$	(5,208	)
Corporate obligations	10,477		(276		)	—		—			10,477		(276		)
Total	$	26,086	$	(5,033	)	$	803	$	(451	)	$	26,889	$	(5,484	)

Investments Classified by Contractual Maturity Date

The amortized cost and estimated fair value of available-for-sale debt securities at June 30, 2014, by contractual maturity, were as follows:

	Cost		Estimated  Fair Value
	(in thousands)
Debt securities:
Mature after one year through three years	$	228	$	236
Mature in more than three years	32,146		33,653
Total debt securities	32,374		33,889
Securities with no contractual maturities	180,400		198,309
Total	$	212,774	$	232,198

Equity Method Investments

The following table presents summarized income statement information for iGo for the three and six months ended March 31, 2014, the periods on which the loss recognized by the Company for the three and six months ended June 30, 2014, was based and for API for the three months ended May 31, 2014, its most recently completed quarterly fiscal period.

	API			iGo
	Three Months Ended May 31, 2014			Three Months Ended March 31, 2014			Six Months Ended March 31, 2014
	(in thousands)
Revenues	$	53,169		$	1,568		$	4,778
Gross loss	$	10,410		$	34		$	(1,112	)
Net loss	$	(14,984	)	$	(1,119	)	$	(4,036	)

The following table summarizes the Company's equity-method investments.

	Ownership				Carrying Value				Income (Loss) Recognized
									Three Months Ended					Six Months Ended
	June 30, 2014		December 31, 2013		June 30, 2014		December 31, 2013		June 30, 2014			June 30, 2013		June 30, 2014			June 30, 2013
					(in thousands)
Traditional equity method
Again Faster	40.0	%	40.0	%	$	3,378	$	3,671	$	(164	)	$	—	$	(293	)	$	—
iGo	44.7	%	44.7	%	2,863		4,668		(501		)	—		(1,805		)	—
Fair value option
API	20.6	%			31,330		—		3,539			—		3,539			—
Total					$	37,571	$	8,339	$	2,874		$	—	$	1,441		$	—