Stock-Based Compensation Stock Option Awards (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Remaining Contractual Term, Outstanding at (in years)	1 year 8 months 12 days
Compensation expense	$ 3,194	$ 3,222	$ 4,520
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	5 years
Stock option life (in years)	10 years
Options, grants in period (in shares)	0	0	335,000
Grant Price	$ 34.50
Exercise Price	$ 60.00
Annualized Volatility	60.90%
Annual Dividend Rate	0.00%
Risk Free Rate	1.25%
Fair Value	$ 5,423
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at (in shares)	688,000	701,000	419,000
Granted (in shares)			335,000
Forfeited (in shares)	(18,000)	(3,000)	(41,000)
Expired (in shares)	(9,000)	(10,000)	(12,000)
Outstanding at (in shares)	661,000	688,000	701,000
Vested and expected to vest at March 31, 2015 (in shares)	655,000
Exercisable at March 31, 2015 (in shares)	495,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price, Outstanding at (usd per share)	$ 60.45	$ 60.49	$ 60.29
Granted, Weighted Average Exercise Price (usd per share)			60.00
Forfeited, Weighted Average Exercise Price (usd per share)	61.49	57.12	53.82
Expired, Weighted Average Exercise Price (usd per share)	64.50	64.41	62.64
Weighted Average Exercise Price, Outstanding at (usd per share)	60.37	$ 60.45	$ 60.49
Vested and expected to vest at March 31, 2015, Weighted Average Exercise Price (usd per share)	60.37
Exercisable at March 31 2015, Weighted Average Exercise Price (usd per share)	$ 60.49
Weighted Average Remaining Contractual Term, Outstanding at (in years)	6 years 2 months 12 days
Vested and expected to vest at March 31, 2015, Weighted Average Remaining Contractual Term (in years)	6 years 2 months 12 days
Exercisable at March 31, 2015, Weighted Average Remaining Contractual Term (in years)	6 years
Outstanding at, Intrinsic Value	$ 0
Vested and expected to vest at March 31, 2015, Outstanding, Aggregate Intrinsic Value	0
Exercisable at March 31, 2015, Intrinsic Value	0
Compensation expense	$ 1,363	$ 1,366	$ 3,203
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	2 years
Minimum [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option life (in years)	6 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Maximum [Member] \| Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option life (in years)	6 years 6 months

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Exercise Price

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Fair Value

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Price

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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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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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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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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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Net number of share options (or share units) granted during the period.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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