Minimum amount of unrestricted cash, cash equivalents and marketable securities, plus availability under the Credit Agreement at the end of each fiscal quarter, determined on a rolling four quarter basis, required under the Credit Agreement.

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Period Type:	duration

- Definition

One Month Term

+ Details

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- Definition

Potential increase to maximum borrowing capacity under the credit facility, if requested by the Company and agreed to by the Bank, without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Six Month Term

+ Details

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- Definition

Three Month Term

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- Definition

Maximum borrowing capacity, including potential increase to borrowing capacity if requested by the Company and agreed to by the Bank, under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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- Definition

Reflects when the credit facility terminates, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Reflects when the credit facility first became available, which may be presented in a variety of ways (year, month and year, day, month and year, quarter).

+ References

+ Details

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- Definition

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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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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CREDIT AGREEMENT (Details) (USD $)	1 Months Ended	6 Months Ended
CREDIT AGREEMENT (Details) (USD $)	May 31, 2011	Sep. 30, 2011	Mar. 31, 2011
Line of Credit Facility [Line Items]
Line of Credit Facility, Initiation Date	May 2011
Line of Credit Facility, Maximum Borrowing Capacity		$ 100,000,000
Potential Increase to Borrowing Capacity		100,000,000
Total Facility Size, Including Potential Increase to Borrowing Capacity		200,000,000
Outstanding Borrowings Under The Line Of Credit		17,500,000	0
One Month Term		1 month
Three Month Term		3 months
Six Month Term		6 months
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.20%
Line of Credit Facility, Expiration Date		May 9, 2014
Minimum Required Liquid Funds		$ 200,000,000
Line Of Credit Facility Interest Rate Spread Below The Banks Announced Prime Rate [Member]
Line of Credit Facility [Line Items]
Loans Under The Credit Agreement, Basis Spread on Variable Rate		1.50%
Line Of Credit Facility Interest Rate Spread Above A Daily One Month LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Loans Under The Credit Agreement, Basis Spread on Variable Rate		1.10%
Line Of Credit Facility Interest Rate Spread Above Adjusted LIBOR Rate For A Term Of One Three Or Six Months [Member]
Line of Credit Facility [Line Items]
Loans Under The Credit Agreement, Basis Spread on Variable Rate		1.10%