Employee Benefit Plans - Future Benefit Payments Under Pension Plans (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014
Pension Plans
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
2015	$ 1,053
2016	1,081
2017	1,126
2018	1,230
2019	1,272
Thereafter	7,408
Retirement Plan \| La Barge
Schedule of Pension and Other Postretirement Benefits Expected Benefit Payments [Line Items]
2015	510
2016	507
2017	502
2018	494
2019	484
Thereafter	$ 2,202

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Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

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Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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