Contracts in Progress - Schedule of Contract Cost and Recognized Income Not Yet Billed and Related Amounts (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Contractors [Abstract]
Cost incurred on contracts in progress	$ 454,133	$ 567,144
Recognized income	15,232	50,812
Contract cost in excess of cost and recognized income	469,365	617,956
Progress billings and advance payments	(454,119)	(607,397)
Total Contract in progress	15,246	10,559
Contract cost and recognized income not yet billed	26,307	20,451
Contract billings in excess of cost and recognized income	(11,061)	(9,892)
Net cost of contracts in progress	$ 15,246	$ 10,559

Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57807-111642

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57788-111642

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 35
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57795-111642

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant