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Receivables (Aging of past due financing receivables) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 105,913 | $ 97,547
Total Financing Receivables | 105,913 |
Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Financing Receivables | 85,376 |
Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Total Financing Receivables | 20,537 |
31-60 Days Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,372 |
31-60 Days Past Due | Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,857 |
31-60 Days Past Due | Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 515 |
61-90 Days Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,310 |
61-90 Days Past Due | Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,142 |
61-90 Days Past Due | Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 168 |
91-120 Days Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 852 |
91-120 Days Past Due | Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 668 |
91-120 Days Past Due | Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 184 |
Greater than 120 Day Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,889 |
Greater than 120 Day Past Due | Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,263 |
Greater than 120 Day Past Due | Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 626 |
Total Past Due |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,423 |
Total Past Due | Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 6,930 |
Total Past Due | Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,493 |
Current |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 97,490 |
Current | Recognized revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 78,446 |
Current | Deferred revenue |  |
Financing Receivable Recorded Investment Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 19,044 |

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