Property and Equipment

12 Months Ended

Dec. 31, 2021

Property Plant And Equipment [Abstract]

6. Property and Equipment

Property and equipment consists of the following:


	December 31.
	2021			2020
	(in thousands)
Computer equipment and purchased software	$	15,524		$	15,128
Employee related computer equipment		32,230			20,802
Furniture and fixtures		20,180			20,204
Leasehold improvements		90,070			89,850
Internal-use software		20,616			12,528
Construction in progress		4,141			10,014
Total property and equipment		182,761			168,526
Less accumulated depreciation		(86,627	)		(67,403	)
Property and equipment, net	$	96,134		$	101,123

Depreciation and amortization expense was $23.9 million in 2021, $20.6 million in 2020, and $15.0 million in 2019.

Refer to Note 4 regarding the disposal of certain property and equipment associated with a lease termination.

The Company capitalized asset retirement costs of $4.1 million at December 31, 2021 and $4.4 million at December 31, 2020 within leasehold improvements and the related liability is within accrued expenses and other current liabilities and other long-term liabilities on the consolidated balance sheet. These costs represent future lease restoration obligations as required by Company’s leases.

The changes in the asset retirement obligation balance during the year ending December 31, 2021 and December 31, 2020 are as follows:


	Year Ended December 31,
	2021			2020
	(in thousands)
Beginning balance	$	4,884		$	3,533
Additions		72			750
Accretion		267			236
Updates to estimated cash flows		(323	)		365
Ending balance	$	4,900		$	4,884