Taxation (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Income before Income/(Loss) Tax Expenses

The Company had minimal operations in jurisdictions other than the PRC. Income/(loss) before income tax expense consists of:

	Year ended December 31,
	2014			2015			2016
	RMB			RMB			RMB			US$
PRC		946,261			1,292,104			1,263,223			181,943
Non PRC		(4,800	)		(15,913	)		(14,371	)		(2,070	)
		941,461			1,276,191			1,248,852			179,873

Income Tax Expense

The income tax expense is comprised of:

	Year ended December 31,
	2014		2015			2016
	RMB		RMB			RMB			US$
Current		187,447		292,017			136,429			19,650
Deferred		5,334		(6,475	)		(103,800	)		(14,950	)
		192,781		285,542			32,629			4,700

Reconciliation of Income Tax Expense

The reconciliation of income tax expense for the years ended December 31, 2014, 2015 and 2016 is as follows:

	Year ended December 31,
	2014			2015			2016
	RMB			RMB			RMB			US$
Income before income tax expense		941,461			1,276,191			1,248,852			179,873
Income tax expense computed at applicable tax rates (25%)		235,365			319,047			312,213			44,969
Non-deductible expenses		8,344			16,372			25,798			3,716
Change in valuation allowances		5,493			16,054			47,006			6,770
Outside basis difference		27,789			(17,329	)		(28,265	)		(4,071	)
Effect of international tax rate difference		1,200			3,978			3,593			517
Interest expense relating to unrecognized tax benefits		3,984			3,809			2,482			357
Effect of preferential tax rate		(89,394	)		(56,389	)		(330,198	)		(47,558	)
Income tax expense		192,781			285,542			32,629			4,700

Components of Deferred Taxes

The significant components of deferred taxes are as follows:

	December 31,
	2015			2016
	RMB			RMB			US$
Deferred tax assets
Current
Allowance for doubtful accounts		937			7,066			1,017
Accrued staff cost		3,396			3,166			456
Accrued expenses		8,972			52,497			7,561
Revenue recognition		30,912			42,062			6,059
Tax losses		4,071			1,206			174
VAT refund		4,111			3,598			518
Less: Valuation allowances		(6,422	)		(10,367	)		(1,493	)
Net current deferred tax assets		45,977			99,228			14,292
Non-current
Tax losses		17,239			82,735			11,916
Less: Valuation allowances		(17,239	)		(60,300	)		(8,685	)
Net non-current deferred tax assets		—			22,435			3,231
Total deferred tax assets		45,977			121,663			17,523
Deferred tax liabilities
Non-current
Intangible assets and internally-developed software		8,539			8,690			1,251
Outside basis difference		481,371			453,106			65,261
Total non-current deferred tax liabilities		489,910			461,796			66,512
Total deferred tax liabilities		489,910			461,796			66,512

Schedule of Unrecognized Tax Benefits

A roll-forward of unrecognized tax benefits is as follows:

	December 31,
	2015		2016
	RMB		RMB			US$
Beginning balance		17,274		22,003			3,169
Additions based on tax positions related to current year		4,729		—			—
Decreases based on tax positions related to prior years		—		(101	)		(15	)
Ending balance		22,003		21,902			3,154