v3.6.0.2
INCOME TAXES - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Gross unrecognized tax benefit - beginning balance $ 3,316 $ 2,539 $ 1,797
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions (21) 0 0
Increases related to tax positions taken during current year 1,146 777 742
Gross unrecognized tax benefit - ending balance $ 4,441 $ 3,316 $ 2,539