XML 96 R81.htm IDEA: XBRL DOCUMENT v3.6.0.2
Stock Plans - Options Exercised (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Stock Plans      
Cash received from options exercised $ 494 $ 2,233 $ 12,056
Intrinsic value of options exercised $ 1,165 $ 2,089 $ 8,390