Note 8. Employee Benefit Plans (Detail) - Accumulated Benefit Obligations (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2010	Dec. 31, 2011
Projected benefit obligation	$ 22,655	$ 87,895
Projected benefit obligation	54,269
Accumulated benefit obligation	20,578	81,018
Accumulated benefit obligation	48,857
Fair value of plan assets	14,755	65,082
Fair value of plan assets	$ 55,707

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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