Fixed Assets (Tables)

12 Months Ended

Dec. 31, 2017

Property Plant And Equipment and Finite-Lived Intangible Assets, Net By Type [Abstract]

Schedule of fixed assets by category

The following table summarizes our fixed assets by category at December 31:

(in thousands)	2017			2016
Software	$	129,553		$	124,093
Equipment	13,858			11,771
Land, buildings, and building improvements	7,627			7,627
Leasehold improvements	1,375			1,375
Projects in progress	21,898			17,812
Construction in progress	26,312			9,622
Total fixed assets, gross	200,623			172,300
Less: Accumulated depreciation	(117,474		)	(103,158		)
Fixed assets, net	$	83,149		$	69,142