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Stockholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended			6 Months Ended		1 Months Ended
	Feb. 08, 2013	Apr. 18, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	May 23, 2013 Principal Stockholder [Member]	Apr. 30, 2013 Principal Stockholder [Member]	Apr. 02, 2013 Principal Stockholder [Member]	May 23, 2013 Former Board of Directors Chairman [Member]
Equity [Line Items]
Aggregate common stock shares to repurchase										4,000,000
Common Stock Repurchase								2,000,000	2,000,000		2,666,000
Repurchase Price								$ 4.02		$ 4.02	$ 4.50
Dividends per share declared on outstanding common stock	$ 0.08	$ 0.08	$ 0.08		$ 0.08	$ 0.16	$ 0.18
Dividends payable date				Apr. 05, 2013		Jun. 17, 2013
Dividends payable, shareholders record date				Mar. 14, 2013		Jun. 03, 2013

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: 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=27012166&loc=d3e187085-122770

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X

- Definition

Date the dividend to be paid was declared, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

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X

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

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- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: 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 3: 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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- Definition

Aggregate common stock shares to repurchase.

+ References

No definition available.

+ Details

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