Other Assets (Tables)

12 Months Ended

Dec. 31, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of prepaid expenses and other current assets

	December 31,
	2018			2017
Costs to obtain contracts	$	219,307		$	157,970
Accumulated amortization of costs to obtain contracts	(24,992		)	(16,485		)
Unbilled receivables	81,703			51,710
Operating lease right-of-use assets	20,257			25,465
Other assets	39,410			27,804
Total	$	335,685		$	246,464