Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule of Inventory [Line Items]
Raw materials	$ 15,012	$ 15,939
Contracts and other work in process (including certain general stock materials)	36,130	41,166
Finished goods	24,959	18,963
Inventories(1)	156,353	131,569
Inventories include amounts associated with matters such as contract changes, negotiated settlements and claims for unanticipated contract costs	400	500
Segment work in progress	36,130	41,166
K-MAX® program
Schedule of Inventory [Line Items]
Total program inventory	43,600	34,700
Inventory, Noncurrent	22,500
SH-2G(I)
Schedule of Inventory [Line Items]
Contracts and other work in process (including certain general stock materials)	3,600	5,400
Segment work in progress	3,600	5,400
Inventory, Noncurrent	3,200
U.S. Government contracts
Schedule of Inventory [Line Items]
U.S. Government	6,217	6,030
Commercial and other government contracts
Schedule of Inventory [Line Items]
Commercial and other government contracts	$ 74,035	$ 49,471

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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