| ACCOUNTS RECEIVABLE, NET Accounts receivable, net balances at December 31, 2025 and 2024 were as follows (in thousands): | | | | | | | | | | | | | 2025 | | 2024 | | Trade accounts receivable | $ | 469,209 | | | $ | 416,211 | | | Unbilled revenue, at net realizable value | 136,701 | | | 150,362 | | | Total accounts receivable | 605,910 | | | 566,573 | | | Allowance for doubtful accounts | (49,915) | | | (31,715) | | | Accounts receivable, net | $ | 555,995 | | | $ | 534,858 | |
Changes in the allowance for doubtful accounts on accounts receivable are as follows (in thousands): | | | | | | | | | | | | | | | | | | | 2025 | | 2024 | | 2023 | | Balance at beginning of period | $ | (31,715) | | | $ | (25,598) | | | $ | (20,801) | | | Provision | (34,447) | | | (19,979) | | | (13,681) | | | Charge-offs, net of recoveries | 16,247 | | | 13,862 | | | 8,884 | | | Balance at end of period | $ | (49,915) | | | $ | (31,715) | | | $ | (25,598) | |
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