Investments (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

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

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


	September 30, 2015		December 31, 2014
Available-for-sale investments:
Time deposits and certificates of deposit	$	21,152	$	20,900
Bankers’ acceptance drafts		266		82
Commercial paper		1,446		—
Corporate obligations		75,433		24,020
Municipal bonds		4,959		2,099
U.S. agency obligations		93,586		82,493

	$	196,842	$	129,594

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


	September 30, 2015		December 31, 2014
Available-for-sale investments:
Time deposits and certificates of deposit	$	—	$	48
Asset-backed securities		134,917		75,674
Corporate obligations		93,990		64,669
Municipal bonds		3,422		1,254
U.S. agency obligations		8,579		15,556

	$	240,908	$	157,201

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 September 30, 2015:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Time deposits and certificates of deposit	$	21,152	$	—	$	—		$	21,152
Bankers’ acceptance drafts		266		—		—			266
Commercial paper		1,446		—		—			1,446
Corporate obligations		75,448		9		(24	)		75,433
Municipal bonds		4,953		6		—			4,959
U.S. agency obligations		93,558		36		(8	)		93,586

	$	196,823	$	51	$	(32	)	$	196,842

Long-term investments:
Asset-backed securities	$	134,914	$	71	$	(68	)	$	134,917
Corporate obligations		94,131		39		(180	)		93,990
Municipal bonds		3,400		27		(5	)		3,422
U.S. agency obligations		8,576		3		—			8,579

	$	241,021	$	140	$	(253	)	$	240,908


As of December 31, 2014:	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
Short-term investments:
Time deposits and certificates of deposit	$	20,901	$	—	$	(1	)	$	20,900
Bankers’ acceptance drafts		82		—		—			82
Corporate obligations		24,029		2		(11	)		24,020
Municipal bonds		2,100		—		(1	)		2,099
U.S. agency obligations		82,488		14		(9	)		82,493

	$	129,600	$	16	$	(22	)	$	129,594

Long-term investments:
Time deposits and certificates of deposit	$	48	$	—	$	—		$	48
Asset-backed securities		75,778		5		(109	)		75,674
Corporate obligations		64,842		1		(174	)		64,669
Municipal bonds		1,258		—		(4	)		1,254
U.S. agency obligations		15,563		2		(9	)		15,556

	$	157,489	$	8	$	(296	)	$	157,201

- 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.

+ References + Details