Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Measurements [Abstract]

Fair Value of Financial Assets and Liabilities Measured at Recurring Basis

	As of December 31, 2013								As of December 31, 2014
	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	$	683,994	$	-	$	-	$	683,994	$	1,129,833	$	-	$	-		$	1,129,833
Short-term investments:
Trading securities		253		-		-		253		173		-		-			173
Available-for-sale investments
Listed equity securities		-		-		-		-		43,558		-		-			43,558
Bank financial products		-		-		-		-		-		14,505		-			14,505
Others		-		495		-		495		-		500		-			500
Long-term investments
Listed equity securities		-		-		-		-		47,644		-		-			47,644
Contingent consideration		-		-		-		-		-		-		(22,168	)		(22,168	)
Total	$	684,247	$	495	$	-	$	684,742	$	1,221,208	$	15,005	$	(22,168	)	$	1,214,045

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

	Total
Balance at December 31, 2013		-
Addition in connection with business acquisition (Note 3(1)&(3))		20,951
Increase in fair value		1,217
Balance at December 31, 2014		22,168