Pension Plan (Annual and Quarter) (Detail) - Expected projected benefit payments (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Projected benefit payments due	$ 893
Projected benefit payments due	613
Projected benefit payments due	435
Projected benefit payments due	637
Projected benefit payments due	$ 667

Amount of benefits expected to be paid in the next rolling twelve months following the latest balance sheet presented from a defined benefit plan.

No definition available.

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Amount of benefits expected to be paid in the fifth rolling twelve months following the latest balance sheet presented from a defined benefit plan.

No definition available.

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Amount of benefits expected to be paid in the fourth rolling twelve months following the latest balance sheet presented from a defined benefit plan.

No definition available.

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Amount of benefits expected to be paid in the third rolling twelve months following the latest balance sheet presented from a defined benefit plan.

No definition available.

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Amount of benefits expected to be paid in the second rolling twelve months following the latest balance sheet presented from a defined benefit plan.

No definition available.

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