XML 51 R35.htm IDEA: XBRL DOCUMENT v3.6.0.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of Purchased and Internally Developed Software (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Less accumulated amortization $ (87,486) $ (61,405)
Net 157,050 109,767
Software    
Finite-Lived Intangible Assets [Line Items]    
Less accumulated amortization (47,957) (42,930)
Net 27,303 21,435
Software | Purchased software    
Finite-Lived Intangible Assets [Line Items]    
Software 23,753 23,569
Software | Internally developed software    
Finite-Lived Intangible Assets [Line Items]    
Software $ 51,507 $ 40,796