Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Measurements [Abstract]

Fair Value of Financial Assets and Liabilities Measured at Recurring Basis

	As of December 31, 2014										As of December 31, 2015
	Fair Value Measurements at the Reporting Date Using										Fair Value Measurements at the Reporting Date Using
	Quoted prices in		Significant								Quoted prices in		Significant
	active markets		other		Significant						active markets		other		Significant
	for identical		observable		unobservable						for identical		observable		unobservable
	instruments		inputs		inputs			Total			instruments		inputs		inputs			Total
	(level 1)		(level 2)		(level 3)			balance			(level 1)		(level 2)		(level 3)			balance
Cash equivalents-term deposits	$	1,129,833	$	-	$	-		$	1,129,833		$	788,337	$	-	$	-		$	788,337
Short-term investments:
Trading securities		173		-		-			173			180		–		–			180
Available-for-sale investments
Listed equity securities		43,558		-		-			43,558			–		-		-			-
Bank financial products		-		14,505		-			14,505			-		31,868					31,868
Others		-		500		-			500			-		500		-			500
Long-term investments
Listed equity securities		47,644		-		-			47,644			28,413		-		-			28,413
Debt Securities		-		-		-			-			-		-		7,471			7,471
Contingent consideration		-		-		(22,168	)		(22,168	)		-		-		(2,168	)		(2,168	)
Total	$	1,221,208	$	15,005	$	(22,168	)	$	1,214,045		$	816,930	$	32,368	$	5,303		$	854,601

Reconciliation of Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)

	Total
Balance at January 1, 2014	$	-
Addition in connection with business acquisition in 2014		(20,951	)
Increase in fair value		(1,217	)
Balance at December 31, 2014		(22,168	)
Addition in connection with investment in available-for-sale		7,471
Settlements		20,000
Balance at December 31, 2015	$	5,303