Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Summary of Significant Accounting Policies [Abstract]

Property and Equipment, Estimated Useful Lives

Computer equipment and application software	3 – 6 years
Building	44 – 60 years
Office building related facility and machines	10 – 15 years
Furniture and vehicles	3 – 10 years
Leasehold improvements	lesser of the lease term or the
	estimated useful life of the assets

Acquired Intangible Assets, Estimated Useful Lives

Domain names	3 - 10 years
Source code	5 - 8 years
Technology	2 - 10 years
Non-compete agreement	1 - 6 years
Operating license	5 - 30 years
Trademarks	3 - 10 years
User base	0.5 - 1 year
Customer relationship	3 years
Distributor relationship	5 years
Backlog	3 years

Total revenue [Member] | Credit Concentration Risk [Member]

Concentration Risk [Line Items]

Concentration of Credit Risk

	Year ended December 31,
	2012			2013		2014
Customer
A		5	%		*-		*-
B		10	%		*-		*-

“*” means less than 10%

Accounts receivable [Member] | Credit Concentration Risk [Member]

Concentration Risk [Line Items]

Concentration of Credit Risk

	December 31,
	2013			2014
Customer
B		32	%		*-
C		*-			14	%

“*” means less than 10%