Income Taxes	9 Months Ended
Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We determine our provision for income taxes for interim periods using an estimate of our annual effective tax rate. We record any changes affecting the estimated annual tax rate in the interim period in which the change occurs, including discrete tax items. Our effective rate was 17.9% and 19.3% for the three months ended September 30, 2016 and 2015, and (9.2)% and 21.1% for the nine months ended September 30, 2016 and 2015. The effective tax rate for the nine months ended September 30, 2016 is a tax benefit measured against book income due to discrete income tax items including the release of a valuation allowance for net operating losses in the first quarter of 2016, as well as recognition of excess tax benefits related to share-based payments resulting from the adoption of new accounting guidance for share-based payments as of January 1, 2016. The effective tax rate for the nine months ended September 30, 2015 was primarily related to the sale of eLong.

Income Taxes

9 Months Ended

Sep. 30, 2016

We determine our provision for income taxes for interim periods using an estimate of our annual effective tax rate. We record any changes affecting the estimated annual tax rate in the interim period in which the change occurs, including discrete tax items. Our effective rate was 17.9% and 19.3% for the three months ended September 30, 2016 and 2015, and (9.2)% and 21.1% for the nine months ended September 30, 2016 and 2015.

The effective tax rate for the nine months ended September 30, 2016 is a tax benefit measured against book income due to discrete income tax items including the release of a valuation allowance for net operating losses in the first quarter of 2016, as well as recognition of excess tax benefits related to share-based payments resulting from the adoption of new accounting guidance for share-based payments as of January 1, 2016. The effective tax rate for the nine months ended September 30, 2015 was primarily related to the sale of eLong.