Summary of significant accounting policies (Tables)

9 Months Ended

Sep. 30, 2022

The change in allowance for doubtful accounts is as follows (in thousands):


	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2022		2021		2022		2021
Balance at beginning of period	$	5,756	$	5,256	$	8,132	$	5,746
Provision for bad debts, included in selling, general and administrative	4,628		1,903		11,308		5,417
Uncollectible receivables written off	(2,202)		(114)		(11,258)		(4,118)
Balance at end of period	$	8,182	$	7,045	$	8,182	$	7,045