DESCRIPTION OF BUSINESS (Details 2)	Mar. 31, 2014 guestroom state
Description of business
Number of guestrooms	11,353
Number of states in which hotel properties are located	22
Hotels
Description of business
Number of upscale and upper midscale hotel properties owned	90
TRS Lessees
Description of business
Equity interests owned other than 100%, number of subsidiaries	1
TRS Lessees \| Maximum
Description of business
Controlling interest owned (as a percent)	100.00%
TRS Lessees \| Holiday Inn Express & Suites \| San Francisco, CA
Description of business
Controlling interest owned (as a percent)	80.00%

Represents the number of subsidiaries of the entity in which the percentage of equity interests owned is other than 100%.

No definition available.

Name:	inn_NumberOfSubsidiariesNotWhollyOwned
Namespace Prefix:	inn_
Data Type:	xbrli:integerItemType
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