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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Debt Securities, Available-for-sale (Details) $ in Thousands | Mar. 31, 2026 USD ($) security | Dec. 31, 2025 USD ($) security
--- | --- | ---
Funds Held for Clients |  |
Funds Held For Clients, Restricted Cash, Amortized Cost | $ 4,652 | $ 1,787
Funds Held For Clients, Restricted Cash and Debt Securities, Amortized Cost | 90,034 | 90,004
Funds Held For Clients, Restricted Cash, Gross Unrealized Gains | 3 | 0
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Gains | 167 | 529
Funds Held For Clients, Restricted Cash, Gross Unrealized Losses | (4) | (3)
Gross Unrealized Losses | (320) |
Funds Held For Clients, Restricted Cash and Debt Securities, Gross Unrealized Losses | (320) | (97)
Funds Held For Clients, Restricted Cash | 4,651 | 1,784
Funds Held For Clients, Restricted Cash and Debt Securities | $ 89,881 | $ 90,436
Number of securities in unrealized gain position | security | 56 | 127
Number of securities in unrealized loss position | security | 92 | 27
Individually |  |
Funds Held for Clients |  |
Gross Unrealized Losses | $ (14) | $ (13)
Aggregate |  |
Funds Held for Clients |  |
Gross Unrealized Losses |  | (94)
Corporate debt securities |  |
Funds Held for Clients |  |
Amortized Cost | 81,006 | 83,160
Gross Unrealized Gains | 160 | 501
Gross Unrealized Losses | (309) | (77)
Aggregate Estimated Fair Value | 80,857 | 83,584
Municipal bonds |  |
Funds Held for Clients |  |
Amortized Cost | 842 | 1,542
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (7) | (17)
Aggregate Estimated Fair Value | 835 | 1,525
U.S. Government agency securities |  |
Funds Held for Clients |  |
Amortized Cost | 3,534 | 3,515
Gross Unrealized Gains | 4 | 28
Gross Unrealized Losses | 0 | 0
Aggregate Estimated Fair Value | 3,538 | 3,543
Available-for-sale securities |  |
Funds Held for Clients |  |
Amortized Cost | 85,382 | 88,217
Gross Unrealized Gains | 164 | 529
Gross Unrealized Losses | (316) | (94)
Aggregate Estimated Fair Value | $ 85,230 | $ 88,652

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