Annual report pursuant to Section 13 and 15(d)

Internally Developed Software (Details)

v3.8.0.1
Internally Developed Software (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Internally developed software $ 46,342 $ 33,718  
Less accumulated amortization (24,168) (18,858)  
Internally developed software, net 22,174 14,860  
Amortization expense $ 5,310 $ 3,646 $ 2,658
Internally developed software      
Estimated Useful Life 5 years