Amendment Suspension Or Termination Period Of Share

No definition available.

Name:	ck0001585389_AmendmentSuspensionOrTerminationPeriodOfShare
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Commitments and Contingencies [Line Items]

+ References

No definition available.

+ Details

Name:	ck0001585389_CommitmentsAndContingenciesLineItems
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum Weighted Average Number Of Shares Outstanding Basic Percentage

+ References

No definition available.

+ Details

Name:	ck0001585389_MaximumWeightedAverageNumberOfSharesOutstandingBasicPercentage
Namespace Prefix:	ck0001585389_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Offering Price

+ References

No definition available.

+ Details

Name:	ck0001585389_OfferingPrice
Namespace Prefix:	ck0001585389_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Reinvestment Plan Notice Period

+ References

No definition available.

+ Details

Name:	ck0001585389_ReinvestmentPlanNoticePeriod
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Shareholders Shares Holding Period

+ References

No definition available.

+ Details

Name:	ck0001585389_ShareholdersSharesHoldingPeriod
Namespace Prefix:	ck0001585389_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount payable to broker-dealers and clearing organizations, including, but not limited to, securities failed-to-receive, certain deposits received for securities loaned, open transactions, and floor-brokerage payables.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=35710130&loc=d3e41645-110958

+ Details

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

- Definition

Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

+ References

Reference 1: 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

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

+ References

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_PlanNameAxis=ck0001585389_ShareRedemptionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=ck0001585389_DistributionReinvestmentPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=ck0001585389_CommonClassTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended		12 Months Ended
	Jan. 31, 2016	Jul. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies [Line Items]
Redemptions of common stock (in shares)		1,750		0
Share Redemption Program
Commitments and Contingencies [Line Items]
Amendment, suspension or termination period of share			30 days
Maximum weighted-average number of shares outstanding percentage			5.00%
Share Redemption Program \| Minimum
Commitments and Contingencies [Line Items]
Shareholders share holding period			1 year
Distribution Reinvestment Plan
Commitments and Contingencies [Line Items]
Percentage of offering price under distribution reinvestment plan			95.00%
Amendment, suspension or termination period for distribution reinvestment Plan			10 days
Sales commission or dealer manager fee payable			$ 0
Class A Common stock \| Distribution Reinvestment Plan
Commitments and Contingencies [Line Items]
Shares issued pursuant to distribution reinvestment plan			132,000
Class T Common stock \| Distribution Reinvestment Plan
Commitments and Contingencies [Line Items]
Shares issued pursuant to distribution reinvestment plan			64
Subsequent Event
Commitments and Contingencies [Line Items]
Redemptions of common stock (in shares)	1,095