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Incentive Plans (Details)	Mar. 31, 2013
Incentive Plans [Abstract]
Number of stock options outstanding (in shares)	0
Common stock reserved for issuance [Line Items]
Common shares reserved for issuance (in shares)	4,430,000
Stock option plan [Member]
Common stock reserved for issuance [Line Items]
Common shares reserved for issuance (in shares)	4,320,000
Other employee benefit plan [Member]
Common stock reserved for issuance [Line Items]
Common shares reserved for issuance (in shares)	100,000

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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