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Acquisition and divestitures (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended	9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Feb. 02, 2026	Sep. 30, 2025	Sep. 30, 2024
Acquisition and Divestitures [Line Items]
Payments for acquisition					$ 12,100	$ 0
Goodwill impairment charge		$ 0	$ 6,700		0	6,700
Gain on sale of businesses and long-lived assets		0	5,208		0	29,190
Proceeds from sale of businesses and long-lived assets					1,968	18,321
Payroll and human resource services business [Member]
Acquisition and Divestitures [Line Items]
Goodwill impairment charge			$ 6,700
Gain on sale of businesses and long-lived assets					0	28,190
Proceeds from sale of businesses and long-lived assets					$ 1,968	18,321
Small business distributor customer list [Member]
Acquisition and Divestitures [Line Items]
Gain on sale of businesses and long-lived assets						1,000
Proceeds from sale of businesses and long-lived assets	[1]					$ 0
Lockbox network [Member] | CheckMatch [Member]
Acquisition and Divestitures [Line Items]
Acquired intangibles		$ 14,100
Acquired intangibles, weighted-average useful life (in years)		10 years
Customer lists/relationships [Member] | CheckMatch [Member]
Acquisition and Divestitures [Line Items]
Acquired intangibles		$ 10,500
Acquired intangibles, weighted-average useful life (in years)		7 years
Forecast [Member] | CheckMatch [Member]
Acquisition and Divestitures [Line Items]
Payments for acquisition				$ 24,600
[1] A note receivable was executed in conjunction with this sale. No cash proceeds were received.

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