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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Summary of Contract Assets and Liabilities | The following table presents the beginning and ending balances of contract assets and contract liabilities:
(In thousands) | Contract Assets |  | Contract Liabilities
Beginning Balance, January 1, 2023 | $ | 27,349 |  |  | $ | 33,209 |
Ending Balance, December 31, 2023 | $ | 46,321 |  |  | $ | 22,888 |
Summary of Disaggregation of Revenue | The following table presents our revenue disaggregated by Market Segments as of December 31 as follows:
(In thousands) |  | 2023 |  | 2022 |  | 2021
Aerospace Segment |  |  |  |  |  |
Commercial Transport |  | $ | 432,199 |  |  | $ | 314,564 |  |  | $ | 201,990 |
Military Aircraft |  | 61,617 |  |  | 54,534 |  |  | 70,312 |
General Aviation |  | 80,842 |  |  | 63,395 |  |  | 56,673 |
Other |  | 30,172 |  |  | 28,703 |  |  | 36,263 |
Aerospace Total |  | 604,830 |  |  | 461,196 |  |  | 365,238 |
Test Systems Segment |  |  |  |  |  |
Government & Defense |  | 84,376 |  |  | 73,698 |  |  | 79,670 |
Test Systems Total |  | 84,376 |  |  | 73,698 |  |  | 79,670 |
Total |  | $ | 689,206 |  |  | $ | 534,894 |  |  | $ | 444,908 |
The following table presents our revenue disaggregated by Product Lines as of December 31 as follows:
(In thousands) |  | 2023 |  | 2022 |  | 2021
Aerospace Segment |  |  |  |  |  |
Electrical Power & Motion |  | $ | 268,049 |  |  | $ | 187,446 |  |  | $ | 141,746 |
Lighting & Safety |  | 157,434 |  |  | 124,347 |  |  | 103,749 |
Avionics |  | 113,117 |  |  | 97,234 |  |  | 64,901 |
Systems Certification |  | 26,255 |  |  | 17,222 |  |  | 13,050 |
Structures |  | 9,803 |  |  | 6,244 |  |  | 5,529 |
Other |  | 30,172 |  |  | 28,703 |  |  | 36,263 |
Aerospace Total |  | 604,830 |  |  | 461,196 |  |  | 365,238 |
Test Systems |  | 84,376 |  |  | 73,698 |  |  | 79,670 |
Total |  | $ | 689,206 |  |  | $ | 534,894 |  |  | $ | 444,908 |

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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 -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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