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REVENUE RECOGNITION AND RECEIVABLES (Tables) | 3 Months Ended
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Mar. 31, 2022
REVENUE RECOGNITION AND RECEIVABLES |
Summary of contracts asset and liabilities | Contract assets and liabilities consisted of the following (amounts in thousands) ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | March 31, 2022 | ​ | December 31, 2021 | ​ | ​ | $ Change | ​ | % Change
Contract asset – current | $ | 4,123 | ​ | $ | 4,805 | ​ | $ | (682) | ​ | (14) | %
Contract asset – noncurrent | ​ | 890 | ​ | ​ | 900 | ​ | ​ | (10) | ​ | (1) | %
Contract liability – current | ​ | (23,756) | ​ | ​ | (25,332) | ​ | ​ | 1,576 | ​ | 6 | %
Contract liability – noncurrent | ​ | (78,861) | ​ | ​ | (81,391) | ​ | ​ | 2,530 | ​ | 3 | %
Net contract liability | $ | (97,604) | ​ | $ | (101,018) | ​ | $ | 3,414 | ​ | 3 | %
Schedule of activity in allowances for credit losses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three months ended March 31, 2022 | ​ | Three months ended March 31, 2021
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at beginning of period |  | $ | 13,885 | ​ | $ | 12,121
Current period provision for expected losses |  | ​ | 1,913 | ​ | ​ | 1,122
Write-offs charged against the allowance |  | ​ | (862) | ​ | ​ | (354)
Recoveries collected | ​ | ​ | 108 | ​ | ​ | 124
Balance at end of period | ​ | $ | 15,044 | ​ | $ | 13,013

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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