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Executive Benefits Agreements and Employees Savings Plans - Life Insurance Premiums (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Compensation Related Costs [Abstract] |  |  |
Cost of life insurance premiums | $ 1,159 | $ 851 | $ 851
Increases in cash surrender values | (745) | (479) | (499)
Net cost of life insurance premiums included in SG&A | $ 414 | $ 372 | $ 352

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- Definition Gross cost of life insurance premiums included in SG&A during the reporting period. + References No definition available. + Details
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- Definition Net cost of life insurance premiums included in SG&A during the reporting period. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Data Type: | xbrli:stringItemType
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- 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://www.xbrl.org/2003/role/presentationRef -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 + Details
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