Settlement Assets and Obligations - Schedule of Settlement Assets and Obligations (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Settlement Assets, net of estimated losses
Total settlement assets	$ 1,504,904	$ 1,295,896
Settlement Obligations:
Total settlement obligations	1,506,105	1,297,263
Allowance for estimated losses	5,800	7,100
Deposits, agency-owned accounts	46,100	50,300
Total customer/subscriber account obligations
Settlement Obligations:
Total settlement obligations	1,491,882	1,277,006
MTL Customer account obligations
Settlement Obligations:
Total settlement obligations	1,454,913	1,244,975
Subscriber account obligations
Settlement Obligations:
Total settlement obligations	36,969	32,031
Due to customer payees
Settlement Obligations:
Total settlement obligations	14,223	20,257
Due to customer payees \| Bank
Settlement Obligations:
Total settlement obligations	148,500	151,800
MTL Customer cash and cash equivalents
Settlement Assets, net of estimated losses
Total settlement assets	967,670	1,252,349
MTL Short-term investments
Settlement Assets, net of estimated losses
Total settlement assets	525,000	25,000
Card settlements
Settlement Assets, net of estimated losses
Total settlement assets	12,234	18,547
Card settlements due from merchants
Settlement Assets, net of estimated losses
Total settlement assets	2,522	2,455
Card settlements due from networks
Settlement Assets, net of estimated losses
Total settlement assets	9,712	16,092
Merchant funds held at member banks
Settlement Assets, net of estimated losses
Total settlement assets	$ 121,600	$ 103,900