Receivables (Aging of past due financing receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 132,116	$ 122,307
Total Financing Receivables	132,116
Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	107,788
Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Total Financing Receivables	24,328
31-60 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,678
31-60 Days Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,298
31-60 Days Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	380
61-90 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,520
61-90 Days Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,205
61-90 Days Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	315
91-120 Days Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,623
91-120 Days Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,438
91-120 Days Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	185
Greater than 120 Day Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	11,353
Greater than 120 Day Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	7,287
Greater than 120 Day Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,066
Total Past Due
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	18,174
Total Past Due | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	13,228
Total Past Due | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,946
Current
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	113,942
Current | Recognized revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	94,560
Current | Deferred revenue
Financing Receivable Recorded Investment Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 19,382