Annual report pursuant to Section 13 and 15(d)

Benefit Plan (Details)

v3.3.1.900
Benefit Plan (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Benefit Plan      
Voluntary employer matching contributions $ 1,521 $ 1,176 $ 891