Subsequent Events	3 Months Ended
Mar. 31, 2025
Subsequent Events [Abstract]
Subsequent Events	19. SUBSEQUENT EVENTS Exit Compensation Payments On April 14, 2025, 0.4 million shares of Adtran Networks stock were tendered to the Company and Exit Compensation payments of approximately €7.0 million or approximately $7.5 million, based on the applicable exchange rate at the time of the transaction, was paid to Adtran Networks shareholders. Fifth Amendment to Wells Fargo Credit Agreement On May 6, 2025, the Company, ADTRAN, Inc., and Adtran Networks entered into a fifth amendment to the Credit Agreement ("Amendment No. 5"). Amendment No. 5, together with a substantially concurrent prepayment by the German Borrower of outstanding revolving loans under the German Borrower Sublimit (as defined in the Amended Credit Agreement, which term includes Amendment No. 5 for the purposes of this note) in the amount of $24.0 million, among other things, resulted in (i) a permanent partial reduction in the total commitments under the Amended Credit Agreement from $374.0 million to $350.0 million, (ii) a reduction of the German Borrower Sublimit from $74.0 million to $50.0 million, and (iii) a reduction of the German Commitment Reduction Threshold (as defined in the Amended Credit Agreement) to $25.0 million. The lenders also waived certain events of default related to among others, inaccuracies in the financial statements that were previously delivered to the lenders by the Company with respect to the fiscal quarters ended June 30, 2024 and September 30, 2024, and breaches of the Consolidated Fixed Charge Coverage Ratio (as defined in the Amended Credit Agreement) financial covenant for the fiscal quarters ended June 30, 2024 and September 30, 2024.

Subsequent Events

3 Months Ended

Mar. 31, 2025

19. SUBSEQUENT EVENTS

Exit Compensation Payments

On April 14, 2025, 0.4 million shares of Adtran Networks stock were tendered to the Company and Exit Compensation payments of approximately €7.0 million or approximately $7.5 million, based on the applicable exchange rate at the time of the transaction, was paid to Adtran Networks shareholders.

Fifth Amendment to Wells Fargo Credit Agreement

On May 6, 2025, the Company, ADTRAN, Inc., and Adtran Networks entered into a fifth amendment to the Credit Agreement ("Amendment No. 5"). Amendment No. 5, together with a substantially concurrent prepayment by the German Borrower of outstanding revolving loans under the German Borrower Sublimit (as defined in the Amended Credit Agreement, which term includes Amendment No. 5 for the purposes of this note) in the amount of $24.0 million, among other things, resulted in (i) a permanent partial reduction in the total commitments under the Amended Credit Agreement from $374.0 million to $350.0 million, (ii) a reduction of the German Borrower Sublimit from $74.0 million to $50.0 million, and (iii) a reduction of the German Commitment Reduction Threshold (as defined in the Amended Credit Agreement) to $25.0 million. The lenders also waived certain events of default related to among others, inaccuracies in the financial statements that were previously delivered to the lenders by the Company with respect to the fiscal quarters ended June 30, 2024 and September 30, 2024, and breaches of the Consolidated Fixed Charge Coverage Ratio (as defined in the Amended Credit Agreement) financial covenant for the fiscal quarters ended June 30, 2024 and September 30, 2024.