Investments (Tables)

9 Months Ended

Sep. 30, 2015

Investments Debt And Equity Securities [Abstract]

Schedule of Fair Value of Available-for-Sale Investments by Type of Security

As of September 30, 2015, the fair value of available-for-sale investments by type of security was as follows:

	September 30, 2015
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Corporate bonds	$	44,288	$	—	$	(82	)	$	44,206
Commercial paper		83,254		73		—			83,327
Government securities		22,107		1		—			22,108
	$	149,649	$	74	$	(82	)	$	149,641

- 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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