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Employee Benefit Plans (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Defined Benefit Plan, Fair Value of Plan Assets	$ 24,769	$ 25,045
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	17,781
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	6,988
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Money Market Funds [Member]
Defined Benefit Plan, Fair Value of Plan Assets	644
Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	82
Money Market Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	562
Money Market Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Common Stock [Member]
Defined Benefit Plan, Fair Value of Plan Assets	9,981
Common Stock [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	9,981
Common Stock [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Common Stock [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Corporate Bonds [Member]
Defined Benefit Plan, Fair Value of Plan Assets	6,426
Corporate Bonds [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Corporate Bonds [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	6,426
Corporate Bonds [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Mutual Fund [Member]
Defined Benefit Plan, Fair Value of Plan Assets	7,173
Mutual Fund [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	7,173
Mutual Fund [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Mutual Fund [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Foreign Stock [Member]
Defined Benefit Plan, Fair Value of Plan Assets	545
Foreign Stock [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	545
Foreign Stock [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	0
Foreign Stock [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Fair Value of Plan Assets	$ 0

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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