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Shares Issued Through Equity Offering Program (Details) (Equity Offering Program, USD $)	0 Months Ended	3 Months Ended
	Aug. 09, 2012	Jun. 30, 2013
Equity Offering Program
Shares issued through equity offering program
Maximum aggregate sales price of shares to be sold under an Equity Offering Sales Agreement (in dollars)	$ 50,000,000
Number of shares sold		298,194
Proceeds from sale of shares, net of commission and before offering costs		7,829,000
Payment of commissions on sale of shares		79,000
Payment of offering costs on sale of shares		$ 58,000

X

- Definition

Represents the maximum aggregate sales price of shares to be sold under an equity offering program.

+ References

No definition available.

+ Details

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X

- Definition

The cash outflow for commissions incurred directly with the issuance of an equity security.

+ References

No definition available.

+ Details

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X

- Definition

The cash outflow for offering costs incurred directly with the issuance of an equity security.

+ References

No definition available.

+ Details

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X

- Definition

Represents the net proceeds after commissions but before offering costs from new stocks issued during the period.

+ References

No definition available.

+ Details

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X

- Definition

Number of new stock issued during the period.

+ References

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 12

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 04

-Article 3



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770



Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

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