Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract]
Accrued expenses, current	$ 210,275	$ 125,366
Accrued amounts due to mobile operators and other content providers	121,505	71,762
Money transfer settlement obligations	219,601	159,854
Derivative Liability, Current	63,772	25,891
Accrued expenses and other current liabilities	$ 615,153	$ 382,873