Investments - HFS (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Cash equivalents	$ 13,499	$ 13,699
Short-term investments	49,574	13,869
Long-term investments	2,094	22,220
Total	$ 65,167	$ 49,788