Investments (Tables)

12 Months Ended

Dec. 31, 2013

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:


	Years Ended December 31,
	2013		2012
Available-for-sale investments:
Time deposits	$	3,439	$	52
Bankers acceptance drafts		491		242
Commercial paper and certificates of deposit		114,984		—
Corporate obligations		18,351		—
U.S. treasury obligations		—		13,054
U.S. agency obligations		162,450		313,514

		299,715		326,862
Trading investments:
Mutual funds (1)		1,000		791

	$	300,715	$	327,653

(1)	The mutual funds are associated with the Company’s supplemental defined contribution retirement obligations.

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

The fair value of long-term available-for-sale investments with maturities or estimated lives of more than one year consists of the following:


	Years Ended December 31,
	2013		2012
Time deposits	$	54	$	—
U.S. agency obligations		60,351		12,158

	$	60,405	$	12,158

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

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


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2013:
Short-term investments:
Available-for-sale investments:
Time deposits	$	3,439	$	—	$	—		$	3,439
Bankers acceptance drafts		491		—		—			491
Commercial paper and certificates of deposit		114,973		15		(4	)		114,984
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


	Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
As of December 31, 2012:
Short-term investments:
Available-for-sale investments:
Time deposits	$	52	$	—	$	—		$	52
Bankers acceptance drafts		242		—		—			242
U.S. treasury obligations		13,045		9		—			13,054
U.S. agency obligations		313,262		258		(6	)		313,514

	$	326,601	$	267	$	(6	)	$	326,862

Long-term investments:
U.S. agency obligations	$	12,156	$	2	$	—		$	12,158

- 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