Quarterly report pursuant to Section 13 or 15(d)

Revenue - Disaggregation of Revenue (Details)

v3.21.1
Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Revenues $ 164,981 $ 177,418
Repair    
Disaggregation of Revenue [Line Items]    
Revenues 18,316 32,808
Distribution    
Disaggregation of Revenue [Line Items]    
Revenues 80,802 78,476
Cost Plus Contract    
Disaggregation of Revenue [Line Items]    
Revenues 16,551 19,681
Fixed Price Contract    
Disaggregation of Revenue [Line Items]    
Revenues 23,931 38,916
T&M Contract    
Disaggregation of Revenue [Line Items]    
Revenues 25,381 7,537
DoD    
Disaggregation of Revenue [Line Items]    
Revenues 45,888 64,134
Other government    
Disaggregation of Revenue [Line Items]    
Revenues 59,992 45,990
Commercial    
Disaggregation of Revenue [Line Items]    
Revenues 59,101 67,294
Aviation    
Disaggregation of Revenue [Line Items]    
Revenues 44,371 58,080
Aviation | Repair    
Disaggregation of Revenue [Line Items]    
Revenues 18,316 32,808
Aviation | Distribution    
Disaggregation of Revenue [Line Items]    
Revenues 26,055 25,272
Aviation | Cost Plus Contract    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Aviation | Fixed Price Contract    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Aviation | T&M Contract    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Aviation | DoD    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Aviation | Other government    
Disaggregation of Revenue [Line Items]    
Revenues 25 30
Aviation | Commercial    
Disaggregation of Revenue [Line Items]    
Revenues 44,346 58,050
Fleet    
Disaggregation of Revenue [Line Items]    
Revenues 54,747 53,204
Fleet | Repair    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Fleet | Distribution    
Disaggregation of Revenue [Line Items]    
Revenues 54,747 53,204
Fleet | Cost Plus Contract    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Fleet | Fixed Price Contract    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Fleet | T&M Contract    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Fleet | DoD    
Disaggregation of Revenue [Line Items]    
Revenues 3,102 4,567
Fleet | Other government    
Disaggregation of Revenue [Line Items]    
Revenues 37,208 39,815
Fleet | Commercial    
Disaggregation of Revenue [Line Items]    
Revenues 14,437 8,822
Federal and Defense    
Disaggregation of Revenue [Line Items]    
Revenues 65,863 66,134
Federal and Defense | Repair    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Federal and Defense | Distribution    
Disaggregation of Revenue [Line Items]    
Revenues 0 0
Federal and Defense | Cost Plus Contract    
Disaggregation of Revenue [Line Items]    
Revenues 16,551 19,681
Federal and Defense | Fixed Price Contract    
Disaggregation of Revenue [Line Items]    
Revenues 23,931 38,916
Federal and Defense | T&M Contract    
Disaggregation of Revenue [Line Items]    
Revenues 25,381 7,537
Federal and Defense | DoD    
Disaggregation of Revenue [Line Items]    
Revenues 42,786 59,567
Federal and Defense | Other government    
Disaggregation of Revenue [Line Items]    
Revenues 22,759 6,145
Federal and Defense | Commercial    
Disaggregation of Revenue [Line Items]    
Revenues $ 318 $ 422