Internally Developed Software (Tables)

9 Months Ended

Sep. 30, 2021

Research and Development [Abstract]

Schedule of components of internally developed software, net

Internally developed software, net consisted of the following:

		September 30,		December 31,
	Estimated Useful Life	2021		2020
		(in thousands)
Internally developed software	5 years	$	209,703	$	159,619
Less: accumulated amortization		(84,113)		(63,118)
Internally developed software, net		$	125,590	$	96,501

Schedule of amortization expense

Amortization expense was as follows:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2021		2020		2021		2020
	(in thousands)
Amortization expense	$	7,462	$	5,100	$	20,995	$	13,042