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Stock-Based Compensation (PSUs, RSUs and Restricted Stock) - Additional Information (Detail) - USD ($) shares in Thousands, $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jul. 15, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jul. 22, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Share granted |  | 645 |  |  |
Recognition period of non-vested compensation cost |  | 2 years 4 months 24 days |  |  |
Executive Officers and Certain Employees [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Share granted |  | 300 |  |  |
ADVA Optical Networking SE [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Number of market based PSU awards converted to time based RSU awards | 300 |  |  |  |
Recognition period of non-vested compensation cost |  | 1 year 2 months 1 day |  |  |
Options available for issuance under shareholders-approved equity plan |  |  |  |  | 2,100
Maximum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Options available for issuance under shareholders-approved equity plan |  | 2,300 |  |  |
Performance Stock Units (PSUs) [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  | 3 years |  |  |
Share granted |  |  | 300 | 300 |
Performance Stock Units (PSUs) [Member] | Executive Officers and Certain Employees [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  | 1 year | 2 years | 3 years |
Performance Stock Units (PSUs) [Member] | Minimum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Percentage of performance stock units granted |  | 0.00% |  |  |
Performance Stock Units (PSUs) [Member] | Minimum [Member] | Executive Officers and Certain Employees [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Percentage of performance stock units granted |  | 0.00% | 0.00% | 0.00% |
Performance Stock Units (PSUs) [Member] | Maximum [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Percentage of performance stock units granted |  | 150.00% |  |  |
Performance Stock Units (PSUs) [Member] | Maximum [Member] | Executive Officers and Certain Employees [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Percentage of performance stock units granted |  | 142.80% | 142.80% | 142.80% |
PSUs, RSUs and Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  | 4 years |  |  |
Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  | 1 year |  |  |
Market-Based PSUs, RSUs and Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to other than options |  | $ 15.8 |  |  |
Recognition period of non-vested compensation cost |  | 2 years 3 months |  |  |
Stock Options, PSUs, RSUs or Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Options available for issuance under shareholders-approved equity plan |  | 3,300 |  |  |
Time-Based RSUs [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to other than options |  | $ 17.8 |  |  |
Time-Based RSUs [Member] | ADVA Optical Networking SE [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unrecognized compensation expense related to other than options |  | $ 1.4 |  |  |
Recognition period of non-vested compensation cost |  | 1 year 6 months 25 days |  |  |

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