Inventories - Other Inventory Information (Details) - USD ($) $ in Thousands	Mar. 29, 2019	Dec. 31, 2018
Schedule of Inventory [Line Items]
Inventories	$ 313,894	$ 294,912
K-MAX®
Schedule of Inventory [Line Items]
Inventory, gross	40,400	34,700
Inventory noncurrent	21,000
SH 2GA Super Seasprite Program
Schedule of Inventory [Line Items]
Inventory, gross	5,400	$ 5,400
Inventory noncurrent	$ 5,200

Schedule of Inventory

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- Definition

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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.6(a))
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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
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-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 35
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- Definition

Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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