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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Debt Securities, Available-for-sale (Details) $ in Thousands | Jun. 30, 2026 USD ($) security | Dec. 31, 2025 USD ($) security
--- | --- | ---
Funds Held for Clients |  |
Funds Held For Clients, Restricted Cash, Amortized Cost | $ 5,505 | $ 1,787
Funds Held For Clients, Restricted Cash and Debt Securities, Amortized Cost | 105,023 | 90,004
Funds Held For Clients, Restricted Cash, Gross Unrealized Gains | 1 | 0
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Gains | 98 | 529
Funds Held For Clients, Restricted Cash, Gross Unrealized Losses | (1) | (3)
Gross Unrealized Losses | (512) |
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Losses | (513) | (97)
Funds Held For Clients, Restricted Cash | 5,505 | 1,784
Funds Held For Clients, Restricted Cash and Debt Securities | $ 104,608 | $ 90,436
Number of securities in unrealized gain position | security | 46 | 127
Number of securities in unrealized loss position | security | 131 | 27
Individually |  |
Funds Held for Clients |  |
Gross Unrealized Losses | $ (18) | $ (13)
Aggregate |  |
Funds Held for Clients |  |
Gross Unrealized Losses |  | (94)
Corporate debt securities |  |
Funds Held for Clients |  |
Amortized Cost | 95,967 | 83,160
Gross Unrealized Gains | 95 | 501
Gross Unrealized Losses | (494) | (77)
Aggregate Estimated Fair Value | 95,568 | 83,584
Municipal bonds |  |
Funds Held for Clients |  |
Amortized Cost |  | 1,542
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | (17)
Aggregate Estimated Fair Value |  | 1,525
U.S. Government agency securities |  |
Funds Held for Clients |  |
Amortized Cost | 3,551 | 3,515
Gross Unrealized Gains | 2 | 28
Gross Unrealized Losses | (18) | 0
Aggregate Estimated Fair Value | 3,535 | 3,543
Available-for-sale securities |  |
Funds Held for Clients |  |
Amortized Cost | 99,518 | 88,217
Gross Unrealized Gains | 97 | 529
Gross Unrealized Losses | (512) | (94)
Aggregate Estimated Fair Value | $ 99,103 | $ 88,652

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