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Supplemental balance sheet and cash flow information (intangibles) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | $ 1,267,461 |  | $ 1,267,461 |  | $ 1,282,568
Accumulated amortization | (856,782) |  | (856,782) |  | (823,589)
Net carrying amount | 410,679 |  | 410,679 |  | 458,979
Acquired intangibles |  |  | $ 67,507 |  |
Acquired intangibles, weighted-average amortization period (in years) |  |  | 3 years |  |
Amortization of intangibles | 34,941 | $ 35,855 | $ 110,017 | $ 110,353 |
Estimated future amortization expense |  |  |  |  |
Remainder of 2023 | 40,786 |  | 40,786 |  |
2024 | 101,903 |  | 101,903 |  |
2025 | 73,407 |  | 73,407 |  |
2026 | 46,238 |  | 46,238 |  |
2027 | 34,394 |  | 34,394 |  |
Internal-use software [Member] |  |  |  |  |
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | 539,892 |  | 539,892 |  | 529,306
Accumulated amortization | (395,304) |  | (395,304) |  | (395,514)
Net carrying amount | 144,588 |  | 144,588 |  | 133,792
Acquired intangibles |  |  | $ 66,734 |  |
Acquired intangibles, weighted-average amortization period (in years) |  |  | 3 years |  |
Customer lists/relationships [Member] |  |  |  |  |
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | 479,240 |  | $ 479,240 |  | 497,882
Accumulated amortization | (339,481) |  | (339,481) |  | (312,986)
Net carrying amount | 139,759 |  | 139,759 |  | 184,896
Technology-based intangibles [Member] |  |  |  |  |
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | 97,633 |  | 97,633 |  | 99,613
Accumulated amortization | (51,591) |  | (51,591) |  | (47,478)
Net carrying amount | 46,042 |  | 46,042 |  | 52,135
Partner relationships [Member] |  |  |  |  |
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | 74,429 |  | 74,429 |  | 74,682
Accumulated amortization | (12,292) |  | (12,292) |  | (9,094)
Net carrying amount | 62,137 |  | 62,137 |  | 65,588
Acquired intangibles |  |  | $ 773 |  |
Acquired intangibles, weighted-average amortization period (in years) |  |  | 1 year |  |
Trade names [Member] |  |  |  |  |
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | 39,367 |  | $ 39,367 |  | 44,185
Accumulated amortization | (23,267) |  | (23,267) |  | (26,510)
Net carrying amount | 16,100 |  | 16,100 |  | 17,675
Software to be sold [Member] |  |  |  |  |
Amortizable intangibles [Line Items] |  |  |  |  |
Gross carrying amount | 36,900 |  | 36,900 |  | 36,900
Accumulated amortization | (34,847) |  | (34,847) |  | (32,007)
Net carrying amount | $ 2,053 |  | $ 2,053 |  | $ 4,893

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