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Executive Benefit Agreement, Employee Savings Plans and Collective Bargaining Agreements - Life Insurance Premiums (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Compensation Related Costs [Abstract]
Cost of life insurance premiums	$ 54	$ 14	$ 481
Decreases (increases) in cash surrender values	149	162	(51)
Net cost of life insurance premiums included in SG&A	$ 203	$ 176	$ 430

X

- Definition

Gross cost of life insurance premiums included in SG&A during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

Net cost of life insurance premiums included in SG&A during the reporting period.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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X

- Definition

The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 325
-SubTopic 30
-Section 35
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6384439&loc=d3e42048-111605

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