Property and Equipment

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Property and equipment, net consisted of the following:



	As of December 31,
	2017			2016
	(in thousands)
Buildings	$	634,061		$	548,232
Furniture and equipment	256,509			236,634
Software	151,890			134,321
Leasehold improvements	117,806			108,702
Computers	61,294			58,271
Total property and equipment, gross	1,221,560			1,086,160
Less: accumulated depreciation	(432,123		)	(387,798		)
Total property and equipment, net	$	789,437		$	698,362

Total property and equipment, gross, as of December 31, 2017 and 2016, included $100.9 million and $101.3 million, respectively, for property and equipment recorded under capital leases. Accumulated depreciation, as of December 31, 2017 and 2016, included $43.4 million and $37.9 million, respectively, for property and equipment recorded under capital leases.

Total property and equipment, gross, as of December 31, 2017 and 2016, included $21.1 million and $17.8 million, respectively, for capitalized internally developed software. Accumulated depreciation, as of December 31, 2017 and 2016, included $13.0 million and $9.2 million, respectively, for capitalized internally developed software.

The Company recorded depreciation expense of $61.4 million, $60.8 million and $60.0 million in 2017, 2016 and 2015, respectively.