Carrying Amounts of Assets and Liabilities Immediately Preceding Disposition (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015	May 22, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Non-redeemable noncontrolling interest divested		$ 64,618	$ 65,373
Disposal Group, Not Discontinued Operations | eLong, Inc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total current assets	[1]			$ 350,196
Total long-term assets				137,709
Total assets divested				487,905
Total current liabilities				187,296
Total long-term liabilities				5,782
Total liabilities divested				193,078
Components of accumulated other comprehensive income divested				45,259
Non-redeemable noncontrolling interest divested				92,550
Net carrying value divested				$ 157,018

[1] Includes cash and cash equivalents of approximately $74 million.