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Stockholders' Equity - Additional Information (Detail) (USD $) | 0 Months Ended | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 1 Months Ended |  | 1 Months Ended
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Feb. 08, 2013 | Aug. 27, 2013 | Apr. 18, 2013 | Sep. 30, 2013 | Mar. 31, 2013 | Sep. 30, 2012 | Jun. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2012 | Aug. 14, 2013 Director [Member] | Aug. 31, 2013 Chief Executive Officer [Member] | Jul. 31, 2013 Chief Executive Officer [Member] | Jul. 24, 2013 Chief Executive Officer [Member] Series M [Member] | Jul. 24, 2013 Chief Executive Officer [Member] Common Stock [Member] | 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
Number of preferred stock shares converted |  |  |  |  |  |  |  |  |  |  |  |  | 44,075 |  |  |  |  |
Preferred stock conversion factor |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  |  |  |  |
Total amount of stock Issued during the period |  |  |  |  |  |  |  |  |  |  |  |  |  | 220,375 |  |  |  |
Shares repurchased |  |  |  | 592,000 |  |  |  | 7,258,000 |  | 241,933 | 350,000 |  |  |  |  |  |  |
Stock repurchase price |  |  |  |  |  |  |  |  |  | $ 7.57 |  | $ 7.02 |  |  |  |  |  |
Dividends per share declared on outstanding common stock | $ 0.08 | $ 0.10 | $ 0.08 | $ 0.10 |  | $ 0.08 |  | $ 0.26 | $ 0.26 |  |  |  |  |  |  |  |  |
Dividends payable date |  |  |  |  | Apr. 05, 2013 |  | Jun. 17, 2013 | Sep. 30, 2013 |  |  |  |  |  |  |  |  |  |
Dividends payable, shareholders record date |  |  |  |  | Mar. 14, 2013 |  | Jun. 03, 2013 | Sep. 23, 2013 |  |  |  |  |  |  |  |  |  |

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- 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 + Details
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- Definition Price of a single share of a number of saleable stocks of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + 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 + Details
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