Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Data (Unaudited) (Details)

v3.20.4
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