INCOME TAXES - Unrecognized Tax Benefits (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Unrecognized tax benefits, beginning balance $ 0 $ 329
Additions for prior year tax positions 0 0
Reductions for lapse in statute 0 (329)
Unrecognized tax benefits, ending balance $ 0 $ 0