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Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2015

Adjustments in Balance Sheet Line Items [Member]

Summary of Adjustments of Prior Period Financial Statements

The table below reflects the adjustment in the balance sheet line items for the period ended December 31, 2014.

		December 31, 2014
		As previously reported				Adjustment				As adjusted
Short-term investments		$	129,594			$	157,201			$	286,795
Long-term investments		$	157,201			$	(157,201	)		$	—

Adjustments In Fair Value Of Short Term Investments [Member]

Summary of Adjustments of Prior Period Financial Statements

The fair value of short-term investments consists of the following:

		December 31, 2014
Available-for-sale investments:		As previously reported				Adjustment				As adjusted
Time deposits and certificates of deposit		$	20,900			$	48			$	20,948
Bankers acceptance drafts			82				—				82
Asset-backed securities			—				75,674				75,674
Corporate obligations			24,020				64,669				88,689
Municipal bonds			2,099				1,254				3,353
U.S. agency obligations			82,493				15,556				98,049
		$	129,594			$	157,201			$	286,795

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- Definition

Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22663-107794

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22644-107794

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=56949863&loc=d3e22658-107794

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