XML 68 R51.htm IDEA: XBRL DOCUMENT v3.6.0.2
Fair Value Measurements Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Cash and cash equivalents $ 104,839 $ 172,628 [1]
Money Market Funds [Member]    
Cash and cash equivalents $ 96,700 $ 162,200
[1] Investments that calculate NAV as a practical expedient were recategorized and are no longer included within Level 2 of the valuation hierarchy as of December 31, 2015 (see Note (2) for additional information).