This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

Before tax and reclassification adjustments amount of unrealized holding gain (loss) and transfers on available-for-sale securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

-Name Accounting Standards Codification

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+ Details

- Definition

Value of stock issued as a result of the exercise of stock options.

+ References+ Details

Stockholders' Equity (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Changes in Redeemable Noncontrolling Interest
Stock option exercises			$ 2,199
Share-based compensation			636
Net income	1,427	1,487	2,185	11,953
Stockholders Equity (Narrative) [Abstract]
Pre tax unrealized gains on available for sale investments			92,000
Redeemable Noncontrolling Interest [Member]
Changes in Redeemable Noncontrolling Interest
Beginning Balance			86,541
Stock option exercises			0
Share-based compensation			0
Net income			2,185
Other comprehensive loss			31
Ending Balance	$ 88,757		$ 88,757