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).

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

Name:	us-gaap_MinorityInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Organization and Basis of Presentation - Additional Information (Detail) (USD $)	0 Months Ended
	Sep. 28, 2012	Mar. 31, 2014 Jurisdictions	Dec. 31, 2013
Organization And Basis Of Presentation [Line Items]
Number of foreign jurisdiction		5
Percentage of controlling interest owned by the company in OMHHF		83.68%
Non-controlling interest		$ 5,549,000	$ 5,353,000
Percentage of additional shares purchased from OMHHF	16.32%
Purchase of additional shares of OMHHF	$ 3,000,000
United States [Member]
Organization And Basis Of Presentation [Line Items]
Number of offices providing services		96
Number of states in which an entity operates		25