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Allowance For Credit Losses | 6 Months Ended
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Jun. 30, 2021
Credit Loss [Abstract] |
Allowance For Credit Losses | Note 14 — Allowance for Credit Losses We estimate current expected credit losses on our accounts receivable at each reporting date. We estimate current expected credit losses based on our credit loss history, adjusted for current factors including global economic and business conditions, offshore energy industry and market conditions, customer mix, contract payment terms and past due accounts receivable. The following table sets forth the activity in our allowance for credit losses (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Balance at January 1, | ​ | $ | 3,469 | ​ | $ | —
Additions (reductions) (1) | ​ |  | (76) | ​ |  | 2,424
Write-offs (2) | ​ | ​ | (1,845) | ​ | ​ | —
Adjustments (3) | ​ |  | — | ​ |  | 785
Balance at June 30, | ​ | $ | 1,548 | ​ | $ | 3,209
(1) | Additions (reductions) in allowance for credit losses reflect credit loss reserves (releases) during the respective periods, including a $1.7 million credit loss reserve in 2020 related to a receivable in our Robotics segment.
(2) | The write-offs of allowance for credit losses reflect certain receivables related to our Robotics segment that were previously reserved and subsequently deemed to be uncollectible.
(3) | The adjustment in allowance for credit losses reflects provision for current expected credit losses upon the adoption of ASU No. 2016-13 on January 1, 2020.

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- Definition The entire disclosure for allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -URI http://asc.fasb.org/topic&trid=2196771 + Details
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