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Organization and Basis of Presentation - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 country | Dec. 31, 2013
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Organization And Basis Of Presentation [Line Items] |  |
Number of foreign jurisdiction | 6 |
Percentage of controlling interest owned by the company in OMHHF | 83.68% |
Non-controlling interest | $ 6,005 | $ 5,353
United States [Member] |  |
Organization And Basis Of Presentation [Line Items] |  |
Number of Stores | 94 |
Number of states in which an entity operates | 25 |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 27 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 7 + Details
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