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Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	$ 6,019	$ 5,361	$ 5,287
Guaranteed Investment Contracts [Member] \| Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Guaranteed Investment Contracts [Member] \| Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,914
Guaranteed Investment Contracts [Member] \| Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Guaranteed Investment Contracts [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,914
Mutual Stock Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,035
Mutual Stock Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Mutual Stock Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Mutual Stock Funds [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,035
Equity Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Equity Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	3,070
Equity Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets
Equity Funds [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	3,070
Fair Value, Inputs, Level 1 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	1,035
Fair Value, Inputs, Level 2 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets	4,984
Fair Value, Inputs, Level 3 [Member]
Pension Plan (Details) - Pension plan assets by level within the fair value hierarchy [Line Items]
Fair Value, Pension plan assets

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.

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