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Debt - Additional Information (Detail) - USD ($) $ in Millions				9 Months Ended
	Jul. 07, 2015	Nov. 21, 2014	Sep. 30, 2013	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Mortgage loan outstanding balance				$ 268.8	$ 205.3
Debt instrument maturity date	Jul. 07, 2019
7.0% Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Company issued senior unsecured notes		7.00%
Borrowed amount		$ 25.3
Debt instrument maturity date				Nov. 15, 2019
Notes face value		101.00%
8.0% Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Company issued senior unsecured notes			8.00%
Borrowed amount			$ 27.6
Debt instrument maturity date				Sep. 30, 2018
Notes face value			101.00%

X

- Definition

Percentage of callable rate on principal amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	soho_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 835



-SubTopic 30



-Section 55



-Paragraph 8



-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 835



-SubTopic 30



-Section 45



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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Period Type:	instant

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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 210.5-02.22(a)(1))



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ 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 210.5-02.22(a)(2))



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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X

- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 205



-SubTopic 10



-Section S99



-Paragraph 6



-Subparagraph (SX 210.5-04.(c) Schedule IV)



-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 948



-SubTopic 310



-Section S99



-Paragraph 1



-Subparagraph (SX 210.12-29)



-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

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- Details

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X

- Details

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