Annual report pursuant to Section 13 and 15(d)

Business Segments and Customer Information - Segment Information (Details)

v3.20.4
Business Segments and Customer Information - Segment Information (Details) - USD ($)
$ 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
Segment Reporting Information [Line Items]                      
Revenues $ 150,021 $ 165,505 $ 168,715 $ 177,418 $ 195,271 $ 198,326 $ 189,111 $ 169,919 $ 661,659 $ 752,627 $ 697,218
Operating income 11,914 $ 14,185 $ (21,910) $ 9,734 14,813 $ 17,215 $ 16,416 $ 11,813 13,923 60,257 54,230
Total assets 780,081       845,864       780,081 845,864  
Fleet                      
Segment Reporting Information [Line Items]                      
Revenues                 242,170 214,520 214,809
Aviation                      
Segment Reporting Information [Line Items]                      
Revenues                 165,070 224,546 145,423
Federal and Defense                      
Segment Reporting Information [Line Items]                      
Revenues                 254,419 313,561 336,986
Operating Segments                      
Segment Reporting Information [Line Items]                      
Revenues                 661,659 752,627 697,218
Operating income                 13,923 60,257 54,230
Depreciation and amortization                 24,135 26,927 25,224
Capital expenditures                 4,427 9,660 3,117
Total assets 780,081       845,864       780,081 845,864  
Operating Segments | Fleet                      
Segment Reporting Information [Line Items]                      
Revenues                 242,170 214,520 214,809
Operating income                 26,659 29,819 30,626
Depreciation and amortization                 10,260 11,085 7,299
Capital expenditures                 675 1,076 802
Total assets 161,088       170,142       161,088 170,142  
Operating Segments | Aviation                      
Segment Reporting Information [Line Items]                      
Revenues                 165,070 224,546 145,423
Operating income                 (35,513) 17,901 11,076
Depreciation and amortization                 10,874 12,546 5,123
Capital expenditures                 3,445 8,396 1,772
Total assets 478,861       522,446       478,861 522,446  
Operating Segments | Federal and Defense                      
Segment Reporting Information [Line Items]                      
Revenues                 254,419 313,561 336,986
Operating income                 26,309 18,144 15,797
Depreciation and amortization                 3,001 3,296 12,802
Capital expenditures                 148 58 209
Total assets 66,808       88,966       66,808 88,966  
Operating Segments | Corporate                      
Segment Reporting Information [Line Items]                      
Total assets $ 73,324       $ 64,310       73,324 64,310  
Corporate, Non-Segment                      
Segment Reporting Information [Line Items]                      
Operating income                 (3,532) (5,607) (3,269)
Capital expenditures                 $ 159 $ 130 $ 334