Receivables (Aging of past due financing receivables) (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 122,307	$ 97,547
Total Financing Receivables	122,307	97,547
Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	100,923	78,988
Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	21,384	18,559
31-60 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,098	1,901
31-60 Days Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,523	1,599
31-60 Days Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	575	302
61-90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,410	1,225
61-90 Days Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,174	1,065
61-90 Days Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	236	160
91-120 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	718	937
91-120 Days Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	460	832
91-120 Days Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	258	105
Greater than 120 Day Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	8,571	3,190
Greater than 120 Day Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,345	2,578
Greater than 120 Day Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,226	612
Total Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	13,797	7,253
Total Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	8,502	6,074
Total Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	5,295	1,179
Current
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	108,510	90,294
Current | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	92,421	72,914
Current | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 16,089	$ 17,380