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(Tables)
 12 Months Ended
Dec. 31, 2016
Research and Development [Abstract]  
Schedule Of Internal Use Software Costs
Internal use software development costs were as follows:
 
 
December 31, 2016
 
December 31, 2015
 
 
 
 
 
 
 
(in thousands)
Internal use software development costs, gross
 
$
37,032

 
$
27,265

Accumulated amortization
 
(20,510
)
 
(13,336
)
Internal use software development costs, net
 
$
16,522

 
$
13,929