LONG-TERM INVESTMENTS - SCHEDULE OF LONG-TERM INVESTMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Components of long-term investments
Total long-term investments	$ 137,386	$ 114,983
Cost Method Investments
Components of long-term investments
Total long-term investments	114,532	90,910
Equity Method Investments
Components of long-term investments
Total long-term investments	11,262	10,593
Long-term Marketable Equity Security
Components of long-term investments
Total long-term investments	7,542	7,410
Auction Rate Securities
Components of long-term investments
Total long-term investments	$ 4,050	$ 6,070