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Accounts Receivable, Net | 12 Months Ended
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Dec. 31, 2019
Receivables [Abstract] |
Schedule of Accounts Receivable, Net | Note 3. Accounts Receivable, Net Accounts receivable, net balances at December 31, 2019 and 2018 were as follows (in thousands):
|  | 2019 |  |  | 2018 |
Trade accounts receivable |  | $ | 176,375 |  |  | $ | 159,992 |
Unbilled revenue, at net realizable value |  |  | 60,035 |  |  |  | 60,684 |
Total accounts receivable |  |  | 236,410 |  |  |  | 220,676 |
Allowance for doubtful accounts |  |  | (14,379 | ) |  |  | (13,389 | )
Accounts receivable, net |  | $ | 222,031 |  |  | $ | 207,287 |
Changes in the allowance for doubtful accounts on accounts receivable are as follows (in thousands):
|  | 2019 |  |  | 2018 |  |  | 2017 |
Balance at beginning of period |  | $ | (13,389 | ) |  | $ | (13,827 | ) |  | $ | (13,508 | )
Provision for losses |  |  | (2,430 | ) |  |  | (3,776 | ) |  |  | (5,529 | )
Charge-offs, net of recoveries |  |  | 1,440 |  |  |  | 4,214 |  |  |  | 5,210 |
Balance at end of period |  | $ | (14,379 | ) |  | $ | (13,389 | ) |  | $ | (13,827 | )

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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- References No definition available. + Details
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