Stock-Based Compensation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Stock-Based Compensation [Abstract]
Stock-based compensation cost	$ 672	$ 1,738	$ 1,564	$ 2,578
Consolidated ROACE - return on average capital employed (in hundredths)	50.00%		50.00%
Performance period	3 years		3 years
Cumulative revenue (in hundredths)	25.00%		25.00%
European ROACE - return on average capital employed (in hundredths)	25.00%		25.00%
Reposition charge net of tax (in hundredths)	70.00%		70.00%
Income tax rate (in hundredths)	30.00%		30.00%
Assumptions used in determining the fair value for the options [Abstract]
Expected life of awards in years			6 years 3 months 18 days	6 years 3 months 18 days
Risk-free interest rate (in hundredths)			0.86%	1.93%
Expected volatility of the Company's stock (in hundredths)			87.35%	79.56%
Expected dividend yield on the Company's stock (in hundredths)			0.00%	0.00%
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized Compensation Costs	6,461		6,461
Weighted Average Remaining Service Period in Years			2 years 8 months 12 days
Stock options [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Shares (in shares)	5	141	243	141
Fair Value Per Award (in dollars per share)	$ 5.58	$ 10.45	$ 4.26	$ 10.45
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized Compensation Costs	1,403		1,403
Weighted Average Remaining Service Period in Years			2 years 1 month 6 days
Unrestricted stock [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Shares (in shares)	0	28	0	28
Fair Value Per Award (in dollars per share)	$ 0	$ 14.93	$ 0	$ 14.93
Restricted stock - retention [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Shares (in shares)	15	63	368	63
Fair Value Per Award (in dollars per share)	$ 6.93	$ 14.93	$ 5.80	$ 14.93
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized Compensation Costs	3,341		3,341
Weighted Average Remaining Service Period in Years			3 years 2 months 12 days
Restricted stock - performance based [Member]
Type and fair value of stock-based compensation awards granted [Abstract]
Shares (in shares)	0	190	353	190
Fair Value Per Award (in dollars per share)	$ 0	$ 14.93	$ 5.75	$ 14.93
Unrecognized compensation cost and recognition period [Abstract]
Unrecognized Compensation Costs	$ 1,717		$ 1,717
Weighted Average Remaining Service Period in Years			2 years 3 months 18 days

The weighted average of the Consolidated ROACE (Ratio profitability compared to investments made in new capital).

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Weight percentage of performance criteria of cumulative revenue over a three year period.

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The weighted average of the target European ROACE. (Ratio profitability compared to investments made in new capital)

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The percentage of repositioning charge which was added to ROACE minus by the assumed income tax effect percentage.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Net number of non-option equity instruments granted to participants.

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