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Revenue Recognition - Disaggregation of Revenue by Contract Type, Customer Information and Prime or Subcontractor (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Disaggregation Of Revenue [Line Items] |  |
Revenue | $ 1,363,392 | $ 1,165,864
Prime contractor |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 1,236,253 | 1,089,872
Subcontractor |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 127,139 | 75,992
Department of Defense |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 937,640 | 818,266
Federal civilian agencies |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 363,993 | 292,202
Commercial and other |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 61,759 | 55,396
Cost-plus-fee |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 747,714 | 641,527
Firm fixed-price |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 417,976 | 344,004
Time and materials |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 197,702 | 180,333
Domestic |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 1,324,773 | 1,126,523
Domestic | Prime contractor |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 1,197,634 | 1,050,531
Domestic | Subcontractor |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 127,139 | 75,992
Domestic | Department of Defense |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 937,640 | 818,266
Domestic | Federal civilian agencies |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 363,993 | 292,202
Domestic | Commercial and other |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 23,140 | 16,055
Domestic | Cost-plus-fee |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 747,714 | 641,527
Domestic | Firm fixed-price |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 391,536 | 321,071
Domestic | Time and materials |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 185,523 | 163,925
International |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 38,619 | 39,341
International | Prime contractor |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 38,619 | 39,341
International | Commercial and other |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 38,619 | 39,341
International | Firm fixed-price |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | 26,440 | 22,933
International | Time and materials |  |
Disaggregation Of Revenue [Line Items] |  |
Revenue | $ 12,179 | $ 16,408

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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