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Supplemental balance sheet and cash flow information (available-for-sale debt securities) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Available-for-sale debt securities [Line Items] |  |  |  |
Cost | $ 9,606 |  | $ 13,681 |
Gross unrealized gains | 0 |  | 0 |
Gross unrealized losses | (1,105) |  | (374) |
Fair value | 8,501 |  | 13,307 |
Expected maturities of available-for-sale debt securities |  |  |  |
Due in one year or less | 3,260 |  |  |
Due in two to five years | 2,516 |  |  |
Due in six to ten years | 2,725 |  |  |
Fair value | 8,501 |  | 13,307 |
Funds held for customers [Member] |  |  |  |
Available-for-sale debt securities [Line Items] |  |  |  |
Cost | 9,606 | [1] | 13,681 | [2]
Gross unrealized gains | 0 | [1] | 0 | [2]
Gross unrealized losses | (1,105) | [1] | (374) | [2]
Fair value | 8,501 | [1] | 13,307 | [2]
Cash | 143,702 |  | 241,488 |
Expected maturities of available-for-sale debt securities |  |  |  |
Fair value | 8,501 | [1] | 13,307 | [2]
Funds held for customers [Member] | Canadian and provincial government securities [Member] |  |  |  |
Available-for-sale debt securities [Line Items] |  |  |  |
Cost | 9,606 |  | 9,724 |
Gross unrealized gains | 0 |  | 0 |
Gross unrealized losses | (1,105) |  | (374) |
Fair value | 8,501 |  | 9,350 |
Expected maturities of available-for-sale debt securities |  |  |  |
Fair value | $ 8,501 |  | 9,350 |
Funds held for customers [Member] | Canadian guaranteed investment certificates [Member] |  |  |  |
Available-for-sale debt securities [Line Items] |  |  |  |
Cost |  |  | 3,957 |
Gross unrealized gains |  |  | 0 |
Gross unrealized losses |  |  | 0 |
Fair value |  |  | 3,957 |
Expected maturities of available-for-sale debt securities |  |  |  |
Fair value |  |  | $ 3,957 |
[1] | Funds held for customers, as reported on the consolidated balance sheet as of June 30, 2022, also included cash of $143,702.
[2] | Funds held for customers, as reported on the consolidated balance sheet as of December 31, 2021, also included cash of $241,488.

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