Supplemental balance sheet and cash flow information (other) (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Prepaid product discounts [Roll Forward]
Balance, beginning of year		$ 56,527	$ 50,602
Additions	[1]	9,413	18,689
Amortization		(17,171)	(15,137)
Other		(86)	(45)
Balance, end of period		48,683	54,109
Prepaid product discount payments		12,285	19,077
Accrued liabilities
Deferred revenue	[2]	39,960		$ 52,645
Wages and payroll liabilities, including vacation		31,621		24,951
Employee cash bonuses, including sales incentives		26,102		45,006
Operating lease liabilities		13,278		14,852
Customer rebates		10,638		9,036
Prepaid product discounts due within one year		8,895		11,866
Other		65,281		58,476
Accrued liabilities		195,775		216,832
Deferred revenue recognized		20,238
Supplemental cash flow information
Cash and cash equivalents		43,262	163,338	41,231
Total cash, cash equivalents, restricted cash and restricted cash equivalents		189,588	288,074	285,491	$ 229,409
Funds held for customers [Member]
Supplemental cash flow information
Restricted cash and restricted cash equivalents included in funds held for customers		143,702	121,992
Other non-current assets [Member]
Supplemental cash flow information
Non-current restricted cash included in other non-current assets		$ 2,624	$ 2,744	$ 2,772

[1] Prepaid product discounts are generally accrued upon contract execution. Cash payments for prepaid product discounts were $12,285 for the six months ended June 30, 2022 and $19,077 for the six months ended June 30, 2021.

[2] $20,238 of the December 31, 2021 amount was recognized as revenue during the six months ended June 30, 2022.