PROPERTY AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

Property and equipment consisted of the following (in thousands): 

	December 31,
	2019			2018
Network equipment	$	309,323		$	274,680
Network equipment under capital lease	—			14,206
Furniture and equipment	27,681			28,583
Software	50,048			66,924
Leasehold improvements	372,492			414,212
Buildings under capital lease	—			271,226
Property and equipment, gross	759,544			1,069,831
Less: accumulated depreciation and amortization ($55,198 related to capital leases at December 31, 2018)	(544,433		)	(585,525		)
	$	215,111		$	484,306

Schedule of summary of depreciation and amortization of property and equipment associated with direct costs

Depreciation and amortization of property and equipment consisted of the following (in thousands): 

	Year ended December 31,
	2019		2018		2017
Costs of sales and services	$	76,199	$	73,738	$	68,804
Other depreciation and amortization	5,013		10,644		2,478
Subtotal	81,212		84,382		71,282
Amortization of acquired and developed technologies	4,501		4,034		2,147
Total depreciation and amortization	$	85,713	$	88,416	$	73,429