Selected Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Quarterly Financial Data [Abstract] | |||||||||||
| Revenues | $ 150,021 | $ 165,505 | $ 168,715 | $ 177,418 | $ 195,271 | $ 198,326 | $ 189,111 | $ 169,919 | $ 661,659 | $ 752,627 | $ 697,218 |
| Costs and operating expenses | 138,107 | 151,320 | 156,213 | 161,256 | 180,458 | 181,111 | 172,695 | 158,106 | 606,896 | 692,370 | 644,688 |
| Operating income | 11,914 | 14,185 | (21,910) | 9,734 | 14,813 | 17,215 | 16,416 | 11,813 | 13,923 | 60,257 | 54,230 |
| Net income | $ 6,013 | $ 8,108 | $ (22,624) | $ 3,332 | $ 9,996 | $ 10,527 | $ 9,898 | $ 6,603 | (5,171) | 37,024 | 35,080 |
| Gain on sale of contract | $ 0 | $ 0 | $ 1,700 | ||||||||
| Basic earnings per share: | |||||||||||
| Net income (in dollars per share) | $ 0.54 | $ 0.73 | $ (2.05) | $ 0.30 | $ 0.92 | $ 0.96 | $ 0.90 | $ 0.60 | $ (0.47) | $ 3.38 | $ 3.23 |
| Basic weighted average shares outstanding (in shares) | 11,052,000 | 11,043,000 | 11,041,000 | 11,000,000 | 10,970,000 | 10,970,000 | 10,970,000 | 10,920,000 | 11,034,256 | 10,957,750 | 10,876,201 |
| Diluted earnings per share: | |||||||||||
| Net income (in dollars per share) | $ 0.54 | $ 0.73 | $ (2.05) | $ 0.30 | $ 0.90 | $ 0.95 | $ 0.89 | $ 0.60 | $ (0.47) | $ 3.35 | $ 3.21 |
| Diluted weighted average shares outstanding (in shares) | 11,141,000 | 11,100,000 | 11,041,000 | 11,101,000 | 11,071,000 | 11,060,000 | 11,073,000 | 10,974,000 | 11,034,256 | 11,044,731 | 10,936,057 |
| Business Acquisition [Line Items] | |||||||||||
| Loss on sale of a business entity and certain assets | $ (8,214) | $ 0 | $ 0 | ||||||||
| Gain on sale of property | 1,108 | 0 | 0 | ||||||||
| Goodwill and intangible asset impairment | $ 33,734 | $ 0 | $ 0 | ||||||||
| Miami, Florida | |||||||||||
| Business Acquisition [Line Items] | |||||||||||
| Gain on sale of property | $ 1,100 | ||||||||||
| Prime Turbines | |||||||||||
| Business Acquisition [Line Items] | |||||||||||
| Loss on sale of a business entity and certain assets | $ (7,500) | ||||||||||
| CT Aerospace LLC | |||||||||||
| Business Acquisition [Line Items] | |||||||||||
| Loss on sale of a business entity and certain assets | $ (678) | ||||||||||
| Goodwill and intangible asset impairment | $ 33,700 | ||||||||||
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. No definition available.
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense. No definition available.
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Gain (Loss) on Sale of Contract No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|