CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
General and administrative expense	$ 16,694	$ 13,457	$ 32,155	$ 24,912
Rental income	238	246	476	492
Interest income (expense)	237	(1,128)	1,077	(850)
VIE, Primary Beneficiary
General and administrative expense	671	681	1,234	1,300
Rental income	238	246	476	492
Interest income (expense)	$ 386	$ (821)	$ 1,251	$ (10)