Investments (Tables)

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

Fair Value of Short-Term Available-for-Sale and Trading Investments

The fair value of short-term investments with maturities or estimated lives of less than one year consists of the following:


	June 30, 2014		December 31, 2013
Available-for-sale investments:
Bankers’ acceptance drafts	$	968	$	491
Time deposits and certificates of deposit		69,266		64,989
Commercial paper		27,180		53,434
Corporate obligations		12,880		18,351
U.S. agency obligations		91,834		162,450

	$	202,128	$	299,715
Trading investments:
Mutual funds		—		1,000

	$	202,128	$	300,715

Fair Value of Long-Term Available-for-Sale Investments

The fair value of long-term investments with maturities of more than one year consists of the following:


	June 30, 2014		December 31, 2013
Available-for-sale investments:
Time deposits	$	54	$	54
Asset-backed securities		26,411		—
Corporate obligations		36,341		—
U.S. agency obligations		18,106		60,351

	$	80,912	$	60,405

Gross Unrealized Gains and (Losses) Aggregated by Investment Category Short-Term and Long-Term Securities

The following tables show the gross unrealized gains and (losses) aggregated by investment category for short-term and long-term available-for-sale investments:


As of June 30, 2014:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Bankers’ acceptance drafts	$	968	$	—	$	—		$	968
Time deposits and certificates of deposit		69,264		5		(3	)		69,266
Commercial paper		27,176		4		—			27,180
Corporate obligations		12,880		1		(1	)		12,880
U.S. agency obligations		91,798		36		—			91,834

	$	202,086	$	46	$	(4	)	$	202,128

Long-term investments:
Time deposits	$	54	$	—	$	—		$	54
Asset-backed securities		26,398		20		(7	)		26,411
Time deposits		36,354		5		(18	)		36,341
U.S. agency obligations		18,082		24		—			18,106

	$	80,888	$	49	$	(25	)	$	80,912


As of December 31, 2013:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Bankers’ acceptance drafts	$	491	$	—	$	—		$	491
Time deposits and certificates of deposit		64,983		10		(4	)		64,989
Commercial paper		53,429		5		—			53,434
Corporate obligations		18,360		—		(9	)		18,351
U.S. agency obligations		162,430		22		(2	)		162,450

	$	299,693	$	37	$	(15	)	$	299,715

Long-term investments:
Time Deposits	$	54	$	—	$	—		$	54
U.S. agency obligations		60,374		9		(32	)		60,351

	$	60,428	$	9	$	(32	)	$	60,405

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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