DESCRIPTION OF BUSINESS (Details)	Jun. 30, 2013 item
Description of business
Number of upscale, upper midscale and midscale hotel properties owned	95
Number of guestrooms	11,127
Number of states in which hotel properties are located	24
Number of hotel properties held for sale	3
Holiday Inn Express & Suites \| San Francisco, CA
Description of business
Controlling interest owned (as a percent)	80.00%
TRS Lessees
Description of business
Outstanding equity interests (as a percent)	100.00%

The number of real estate properties held for sale.

No definition available.

Name:	inn_NumberOfRealEstatePropertiesHeldForSale
Namespace Prefix:	inn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the percentage of ownership which the reporting entity holds of its subsidiaries except as separately indicated.

No definition available.

Name:	inn_PercentageOfOwnershipInterestInSubsidiariesExceptAsSpecified
Namespace Prefix:	inn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The number of real estate properties owned as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The number of units in a real estate property owned as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration