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Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets [Line Items]
Gross carrying amount	$ 26,567	$ 26,567
Accumulated amortization	(12,508)	(11,016)
Net carrying amount	14,059	15,551	$ 18,752
Goodwill	$ 18,402	18,402	$ 18,402
Customer relationships
Goodwill And Intangible Assets [Line Items]
Useful life (months)	120 months
Gross carrying amount	$ 25,040	25,040
Accumulated amortization	(11,373)	(10,016)
Net carrying amount	$ 13,667	15,024
Non-compete agreements
Goodwill And Intangible Assets [Line Items]
Useful life (months)	60 months
Gross carrying amount	$ 303	303
Accumulated amortization	(240)	(211)
Net carrying amount	$ 63	92
Domain names
Goodwill And Intangible Assets [Line Items]
Useful life (months)	60 months
Gross carrying amount	$ 1,224	1,224
Accumulated amortization	(895)	(789)
Net carrying amount	$ 329	$ 435

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Goodwill and intangible assets.

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