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Pension Plans - Fair Value of the Company's Pension Plan Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	$ 22,499	$ 18,406	$ 15,077
Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	1,127	464
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	7,455	6,121
U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	4,161	4,205
Mutual Funds-Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	6,776	4,944
Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	2,950	2,640
Mortgage-Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	30	32
Quoted Prices in Active Markets for Identical Assets (Level1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	19,519	15,734
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	1,127	464
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	7,455	6,121
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	4,161	4,205
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Mutual Funds-Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	6,776	4,944
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Quoted Prices in Active Markets for Identical Assets (Level1) [Member] | Mortgage-Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	2,980	2,672
Significant Observable Inputs (Level 2) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | Mutual Funds-Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Observable Inputs (Level 2) [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	2,950	2,640
Significant Observable Inputs (Level 2) [Member] | Mortgage-Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	30	32
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Mutual Funds-Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Mortgage-Backed Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair market value of assets	$ 0	$ 0

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ 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 (b)

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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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