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Income Taxes (Reconciliation of the differences between PRC statutory income tax rate and the Group's effective income tax rate for PRC operations) (Details) - PRC [Member]	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Income Taxes [Line Items]
Statutory income tax rate	25.00%	25.00%	25.00%
Permanent differences	(9.30%)	(2.70%)	(1.70%)
Change in valuation allowance	7.80%	(0.90%)	0.40%
Effect of preferential tax benefits	(11.40%)	(6.30%)	(11.50%)
Uncertain tax positions	3.80%	0.90%	1.30%
Effective income tax rate	15.90%	16.00%	13.50%

X

- Definition

Percentage of the permanent difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.

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Schedule of income taxes [Line Items]

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income exempt from income tax because of a tax holiday.

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