Property and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and Equipment

Property and equipment consist of the following:

	December 31,
	2017			2016
				(Restated)
Computer hardware	$	250,453		$	242,739
Computer software	62,335			47,828
Construction in-progress	471			14,854
Furniture and fixtures	7,736			5,981
Building	8,808			8,808
Leasehold improvements	19,591			16,980
	349,394			337,190
Less: Accumulated depreciation	(237,569		)	(178,985		)
	$	111,825		$	158,205

Depreciation expense was approximately $57.0 million, $51.8 million, and $42.7 million for 2017, 2016, and 2015, respectively. Amortization of property and equipment recorded under capital leases are included in depreciation expense.