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Common Stock - Additional Information (Detail) (USD $) | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2013 | Mar. 31, 2009 | Dec. 31, 2008
Statement Of Partners Capital [Abstract] |  |  |
Common stock authorized by the Board of Directors |  |  | 2,250,000
Maximum percentage of repurchase of common stock |  | 10.00% |
Repurchase of common stock |  | 1,200,000 |
Bank credit agreement to permit share repurchases of common stock |  | $ 15,000,000 |
Total purchased shares | 859,499 |  |
Additional estimated shares | 340,501 |  |

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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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- Definition Bank credit agreement to permit share repurchases of common stock. + References No definition available. + Details
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- Definition Repurchases Of Common Stock + References No definition available. + Details
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