Commitments and Contingencies	6 Months Ended
Jun. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	20. COMMITMENTS AND CONTINGENCIES Legal Matters From time to time the Company is subject to or otherwise involved in various lawsuits, claims, investigations and legal proceedings that arise out of or are incidental to the conduct of our business (collectively, “Legal Matters”), including those relating to employment matters, patent rights, regulatory compliance matters, stockholder claims, and contractual and other commercial disputes. Such Legal Matters, even if not meritorious, could result in the expenditure of significant financial and managerial resources. Additionally, an unfavorable outcome in a legal matter, including in a patent dispute, could require the Company to pay damages, entitle claimants to other relief, such as royalties, or could prevent the Company from selling some of its products in certain jurisdictions. At this time, the Company is unable to predict the outcome of or estimate the possible loss or range of loss, if any, associated with such legal matters. Adtran Networks Legal Matter On May 8, 2023, ADVA and its subsidiary, ADVA Optical Networking North America, Inc. filed a lawsuit in the U.S District Court for the Eastern District of Texas (“EDTX”) against Huawei Technologies Co. Ltd (“Huawei”) seeking a declaration from the court that Huawei violated its commitments to negotiate in good faith and to license standard essential patents (“SEPs”), to the extent any SEPs are practiced by Adtran Networks, on Fair, Reasonable and Non-Discriminatory (“FRAND”) terms and conditions. The case also seeks to obtain a ruling by the court that Adtran Networks has complied with its own commitments and requests that the Court establish FRAND terms and conditions for obtaining a FRAND license on any SEPs to the extend they are practiced by Adtran Networks. The lawsuit also seeks to enjoin Huawei from enforcing five Huawei patents that Adtran Networks considers invalid and/or not practiced, and that Huawei has infringed an Adtran Networks patent. Adtran Networks expects Huawei to respond to the action in August 2023 and expects a trial to be scheduled for the second half of 2024. On July 20, 2023, ADVA Optical Networking SE ("ADVA Germany") was served with a complaint filed by Huawei against ADVA Germany in the District Court München I, Germany, alleging that certain of its products infringe upon one of Huawei’s patents. ADVA Germany's response in the case is due in November 2023, and the filing of a separate nullity action to invalidate the patent is also available in Germany. The Company intends to continue to vigorously defend its interests; however, these matters are subject to many uncertainties, and an adverse outcome in any one of these matters could potentially have a materially adverse impact on the Company's financial position, results of operations and cash flows. Given the current status of these matters, the Company is unable to predict the outcome of or estimate the possible loss or range of loss, if any, associated with such legal matters. DPLTA Exit and Recurring Compensation Costs Pursuant to the terms of the DPLTA, each Adtran Networks shareholder (other than the Company) has received an offer to elect either (1) to remain an Adtran Networks shareholder and receive from us an Annual Recurring Compensation payment, or (2) to receive Exit Compensation plus guaranteed interest. The guaranteed interest under the Exit Compensation is calculated from the effective date of the DPLTA to the date the shares are tendered, less any Annual Recurring Compensation paid. The guaranteed interest rate is 5% plus a variable component that was 1.62% as of June 30, 2023. Assuming all the minority holders of currently outstanding Adtran Networks shares were to elect the second option, we would be obligated to make aggregate Exit Compensation payments, including guaranteed interest, of approximately €319.0 million or approximately $348.1 million, based on an exchange rate as of June 30, 2023 and reflecting interest accrued through June 30, 2023 at a rate of 5.0% in addition to the variable base interest rate according to the German Civil Code (currently 3.12%) during the pendency of the appraisal proceedings discussed below. Shareholders electing the first option of Annual Recurring Compensation may later elect the second option. The opportunity for outside Adtran Networks shareholders to tender Adtran Networks shares in exchange for Exit Compensation had been scheduled to expire on March 16, 2023. However, due to the appraisal proceedings that have been initiated in accordance with applicable German law, this time period for tendering shares has been extended pursuant to the German Stock Corporation Act (Aktiengesetz) and will end two months after the date on which a final decision in such appraisal proceedings has been published in the Federal Gazette (Bundesanzeiger). Our obligation to pay Annual Recurring Compensation under the DPLTA is a continuing payment obligation, which will amount to approximately €10.6 million or $11.6 million (based on the current exchange rate) per year assuming none of the minority Adtran Networks shareholders were to elect Exit Compensation. The foregoing amounts do not reflect any potential increase in payment obligations that we may have depending on the outcome of ongoing appraisal proceedings in Germany. During the three and six months ended June 30, 2023, we accrued $2.9 million and $5.7 million in Annual Recurring Compensation, which was reflected as a reduction to retained (deficit) earnings, respectively. For the three and six months ended June 30, 2023, a total of approximately 46 thousand shares and 63 thousand shares, respectively, of Adtran Networks stock was tendered to the Company and Exit Compensation payments of approximately €0.8 million and €1.1 million, respectively, or approximately $0.9 million and $1.2 million, respectively, based on an exchange rate as of June 30, 2023, were paid to Adtran Networks shareholders. Performance Bonds Certain contracts, customers and jurisdictions in which we do business require us to provide various guarantees of performance such as bid bonds, performance bonds and customs bonds. As of June 30, 2023 and December 31, 2022, we had commitments related to these bonds totaling $12.2 million and $22.0 million, respectively, which expire at various dates through April 2031. In general, we would only be liable for the amount of these guarantees in the event of default under each contract, the probability of which we believe is remote. Purchase Commitments The Company purchases components from a variety of suppliers and use contract manufacturers to provide manufacturing services for our products. Our inventory purchase commitments are for short-term product manufacturing requirements as well as for commitments to suppliers to secure manufacturing capacity. Certain of our inventory purchase commitments with contract manufacturers and suppliers relate to arrangements to secure supply and pricing for certain product components for multi-year periods. As of June 30, 2023, purchase commitments totaled $377.4 million.

Commitments and Contingencies

6 Months Ended

Jun. 30, 2023

Commitments and Contingencies Disclosure [Abstract]

20. COMMITMENTS AND CONTINGENCIES

Legal Matters

From time to time the Company is subject to or otherwise involved in various lawsuits, claims, investigations and legal proceedings that arise out of or are incidental to the conduct of our business (collectively, “Legal Matters”), including those relating to employment matters, patent rights, regulatory compliance matters, stockholder claims, and contractual and other commercial disputes. Such Legal Matters, even if not meritorious, could result in the expenditure of significant financial and managerial resources. Additionally, an unfavorable outcome in a legal matter, including in a patent dispute, could require the Company to pay damages, entitle claimants to other relief, such as royalties, or could prevent the Company from selling some of its products in certain jurisdictions. At this time, the Company is unable to predict the outcome of or estimate the possible loss or range of loss, if any, associated with such legal matters.

Adtran Networks Legal Matter

On May 8, 2023, ADVA and its subsidiary, ADVA Optical Networking North America, Inc. filed a lawsuit in the U.S District Court for the Eastern District of Texas (“EDTX”) against Huawei Technologies Co. Ltd (“Huawei”) seeking a declaration from the court that Huawei violated its commitments to negotiate in good faith and to license standard essential patents (“SEPs”), to the extent any SEPs are practiced by Adtran Networks, on Fair, Reasonable and Non-Discriminatory (“FRAND”) terms and conditions. The case also seeks to obtain a ruling by the court that Adtran Networks has complied with its own commitments and requests that the Court establish FRAND terms and conditions for obtaining a FRAND license on any SEPs to the extend they are practiced by Adtran Networks. The lawsuit also seeks to enjoin Huawei from enforcing five Huawei patents that Adtran Networks considers invalid and/or not practiced, and that Huawei has infringed an Adtran Networks patent. Adtran Networks expects Huawei to respond to the action in August 2023 and expects a trial to be scheduled for the second half of 2024. On July 20, 2023, ADVA Optical Networking SE ("ADVA Germany") was served with a complaint filed by Huawei against ADVA Germany in the District Court München I, Germany, alleging that certain of its products infringe upon one of Huawei’s patents. ADVA Germany's response in the case is due in November 2023, and the filing of a separate nullity action to invalidate the patent is also available in Germany. The Company intends to continue to vigorously defend its interests; however, these matters are subject to many uncertainties, and an adverse outcome in any one of these matters could potentially have a materially adverse impact on the Company's financial position, results of operations and cash flows. Given the current status of these matters, the Company is unable to predict the outcome of or estimate the possible loss or range of loss, if any, associated with such legal matters.

DPLTA Exit and Recurring Compensation Costs

Pursuant to the terms of the DPLTA, each Adtran Networks shareholder (other than the Company) has received an offer to elect either (1) to remain an Adtran Networks shareholder and receive from us an Annual Recurring Compensation payment, or (2) to receive Exit Compensation plus guaranteed interest. The guaranteed interest under the Exit Compensation is calculated from the effective date of the DPLTA to the date the shares are tendered, less any Annual Recurring Compensation paid. The guaranteed interest rate is 5% plus a variable component that was 1.62% as of June 30, 2023. Assuming all the minority holders of currently outstanding Adtran Networks shares were to elect the second option, we would be obligated to make aggregate Exit Compensation payments, including guaranteed interest, of approximately €319.0 million or approximately $348.1 million, based on an exchange rate as of June 30, 2023 and reflecting interest accrued through June 30, 2023 at a rate of 5.0% in addition to the variable base interest rate according to the German Civil Code (currently 3.12%) during the pendency of the appraisal proceedings discussed below. Shareholders electing the first option of Annual Recurring Compensation may later elect the second option. The opportunity for outside Adtran Networks shareholders to tender Adtran Networks shares in exchange for Exit Compensation had been scheduled to expire on March 16, 2023. However, due to the appraisal proceedings that have been initiated in accordance with applicable German law, this time period for tendering shares has been extended pursuant to the German Stock Corporation Act (Aktiengesetz) and will end two months after the date on which a final decision in such appraisal proceedings has been published in the Federal Gazette (Bundesanzeiger).

Our obligation to pay Annual Recurring Compensation under the DPLTA is a continuing payment obligation, which will amount to approximately €10.6 million or $11.6 million (based on the current exchange rate) per year assuming none of the minority Adtran Networks shareholders were to elect Exit Compensation. The foregoing amounts do not reflect any potential increase in payment obligations that we may have depending on the outcome of ongoing appraisal proceedings in Germany. During the three and six months ended June 30, 2023, we accrued $2.9 million and $5.7 million in Annual Recurring Compensation, which was reflected as a reduction to retained (deficit) earnings, respectively.

For the three and six months ended June 30, 2023, a total of approximately 46 thousand shares and 63 thousand shares, respectively, of Adtran Networks stock was tendered to the Company and Exit Compensation payments of approximately €0.8 million and €1.1 million, respectively, or approximately $0.9 million and $1.2 million, respectively, based on an exchange rate as of June 30, 2023, were paid to Adtran Networks shareholders.

Performance Bonds

Certain contracts, customers and jurisdictions in which we do business require us to provide various guarantees of performance such as bid bonds, performance bonds and customs bonds. As of June 30, 2023 and December 31, 2022, we had commitments related to these bonds totaling $12.2 million and $22.0 million, respectively, which expire at various dates through April 2031. In general, we would only be liable for the amount of these guarantees in the event of default under each contract, the probability of which we believe is remote.

Purchase Commitments

The Company purchases components from a variety of suppliers and use contract manufacturers to provide manufacturing services for our products. Our inventory purchase commitments are for short-term product manufacturing requirements as well as for commitments to suppliers to secure manufacturing capacity. Certain of our inventory purchase commitments with contract manufacturers and suppliers relate to arrangements to secure supply and pricing for certain product components for multi-year periods. As of June 30, 2023, purchase commitments totaled $377.4 million.