DEBT - Summary of outstanding indebtedness (Details 2)								12 Months Ended
	Sep. 24, 2015 USD ($) Property Loan	Dec. 19, 2014 USD ($) contract	May 06, 2014 USD ($)	Mar. 28, 2014 Loan	Jan. 10, 2014 USD ($) Room	Jan. 09, 2014 USD ($) Room	Jul. 26, 2013 USD ($)	Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($)	Jul. 22, 2013 USD ($) Property	Mar. 08, 2013 USD ($) Property	Mar. 07, 2013 USD ($) Property	Jan. 25, 2013 USD ($) Property
Debt Instrument [Line Items]
Debt outstanding								$ 657,550,000	$ 677,096,000
Unamortized debt issuance costs								(5,136,000)	(5,560,000)
Debt, net of issuance costs								$ 652,414,000	671,536,000
Revolving credit facility
Debt Instrument [Line Items]
Interest Rate (as a percent)								2.27%
Unsecured debt | Senior unsecured credit facility $450 Million
Debt Instrument [Line Items]
Debt outstanding								$ 200,000,000
Loan amount								450,000,000
Unsecured debt | Senior unsecured credit facility $300 Million
Debt Instrument [Line Items]
Debt outstanding									170,000,000
Loan amount									300,000,000.0
Unsecured debt | KeyBank National Association Term Loan due April 7, 2022
Debt Instrument [Line Items]
Debt outstanding								$ 140,000,000	140,000,000
Interest Rate (as a percent)								2.57%
Unsecured debt | Revolving credit facility | Senior unsecured credit facility $450 Million
Debt Instrument [Line Items]
Debt outstanding								$ 50,000,000
Interest Rate (as a percent)								2.27%
Unsecured debt | Revolving credit facility | Senior unsecured credit facility $300 Million
Debt Instrument [Line Items]
Debt outstanding									95,000,000
Unsecured debt | Term loan | Senior unsecured credit facility $450 Million
Debt Instrument [Line Items]
Debt outstanding								$ 150,000,000
Interest Rate (as a percent)								2.86%
Unsecured debt | Term loan | Senior unsecured credit facility $300 Million
Debt Instrument [Line Items]
Debt outstanding									75,000,000
Mortgage loans
Debt Instrument [Line Items]
Debt outstanding								$ 317,550,000	367,096,000
Number of Properties Encumbered | Property								33
Mortgage loans | Voya (formerly known as ING Life Insurance and Annuity) term loans
Debt Instrument [Line Items]
Number of Properties Encumbered | Property	10
Number of loans | Loan	4
Fixed interest rate (as a percent)	5.18%
Loan amount	$ 119,200,000
Mortgage loans | Voya (formerly known as ING Life Insurance and Annuity) 5.18% Fixed due March 1, 2019 One
Debt Instrument [Line Items]
Debt outstanding								$ 41,328,000	42,574,000
Interest Rate (as a percent)								5.18%
Amortization Period (Years)								20 years
Number of Properties Encumbered | Property								2
Mortgage loans | Voya (formerly known as ING Life Insurance and Annuity) 5.18% Fixed due March 1, 2019 Two
Debt Instrument [Line Items]
Debt outstanding								$ 37,042,000	38,159,000
Interest Rate (as a percent)								5.18%
Amortization Period (Years)								20 years
Number of Properties Encumbered | Property								4
Mortgage loans | Voya (formerly known as ING Life Insurance and Annuity) 5.18% Fixed due March 1, 2019 Three
Debt Instrument [Line Items]
Debt outstanding								$ 23,889,000	24,610,000
Interest Rate (as a percent)								5.18%
Amortization Period (Years)								20 years
Number of Properties Encumbered | Property								3
Mortgage loans | Voya (formerly known as ING Life Insurance and Annuity) 5.18% Fixed due March 1, 2019 Four
Debt Instrument [Line Items]
Debt outstanding								$ 16,970,000	17,482,000
Interest Rate (as a percent)								5.18%
Amortization Period (Years)								20 years
Number of Properties Encumbered | Property								1
Mortgage loans | KeyBank National Association 4.46% Fixed due February 1, 2023
Debt Instrument [Line Items]
Debt outstanding								$ 27,473,000	27,991,000
Interest Rate (as a percent)								4.46%					4.46%
Amortization Period (Years)								30 years
Number of Properties Encumbered | Property								4					4
Loan amount													$ 29,400,000
Mortgage loans | KeyBank National Association 4.52% Fixed due April 1, 2023
Debt Instrument [Line Items]
Debt outstanding								$ 21,291,000	21,683,000
Interest Rate (as a percent)								4.52%
Amortization Period (Years)								30 years
Number of Properties Encumbered | Property								3				3
Loan amount												$ 22,700,000
Mortgage loans | KeyBank National Association 4.30% Fixed due April 1, 2023
Debt Instrument [Line Items]
Debt outstanding								$ 20,626,000	21,022,000
Interest Rate (as a percent)								4.30%
Amortization Period (Years)								30 years
Number of Properties Encumbered | Property								3			3
Fixed interest rate (as a percent)											4.30%
Loan amount											$ 22,000,000
Mortgage loans | KeyBank National Association 4.95% Fixed due August 1, 2023
Debt Instrument [Line Items]
Debt outstanding								$ 36,741,000	37,352,000
Interest Rate (as a percent)								4.95%
Amortization Period (Years)								30 years
Number of Properties Encumbered | Property								2		2
Fixed interest rate (as a percent)										4.95%
Loan amount										$ 38,700,000
Mortgage loans | Bank of America Commercial Mortgage 6.41% Fixed due September 1, 2017
Debt Instrument [Line Items]
Debt outstanding								$ 7,661,000	7,916,000
Interest Rate (as a percent)								6.41%
Amortization Period (Years)								25 years
Number of Properties Encumbered | Property								1
Mortgage loans | Merrill Lynch Mortgage Lending Inc. due August 1, 2016
Debt Instrument [Line Items]
Debt outstanding									5,047,000
Amortization Period (Years)								30 years
Prepayment penalties								$ 0
Mortgage loans | West Alliance Bank (formerly GE Capital Financial Inc.) 5.39% Fixed due April 1, 2020 one
Debt Instrument [Line Items]
Debt outstanding								$ 8,912,000	9,110,000
Interest Rate (as a percent)								5.39%
Amortization Period (Years)								25 years
Number of Properties Encumbered | Property								1
Fixed interest rate (as a percent)				5.39%
Mortgage loans | West Alliance Bank (formerly GE Capital Financial Inc.) 5.39% Fixed due April 1, 2020 two
Debt Instrument [Line Items]
Debt outstanding								$ 4,798,000	4,905,000
Interest Rate (as a percent)								5.39%
Amortization Period (Years)								25 years
Number of Properties Encumbered | Property								1
Mortgage loans | MetaBank 4.25% Fixed due August 1, 2018
Debt Instrument [Line Items]
Debt outstanding								$ 6,588,000	6,852,000
Interest Rate (as a percent)								4.25%
Amortization Period (Years)								20 years
Number of Properties Encumbered | Property								1
Fixed interest rate (as a percent)							4.25%
Loan amount							$ 7,400,000
Mortgage loans | Bank of Cascades loan(s)
Debt Instrument [Line Items]
Amortization Period (Years)		25 years
Number of loans | contract		2
Loan increase		$ 7,900,000
Mortgage loans | Bank Of Cascades Variable due December 19, 2024, Note A
Debt Instrument [Line Items]
Debt outstanding								$ 9,289,000	9,556,000
Interest Rate (as a percent)								2.77%
Amortization Period (Years)								25 years
Number of Properties Encumbered | Property								1
Mortgage loans | Bank Of Cascades 4.30% Fixed due December 19, 2024, Note B
Debt Instrument [Line Items]
Debt outstanding								$ 9,289,000	9,556,000
Interest Rate (as a percent)								4.30%
Amortization Period (Years)								25 years
Fixed interest rate (as a percent)		4.30%
Mortgage loans | Goldman Sachs 5.67% Fixed due July 6, 2016
Debt Instrument [Line Items]
Debt outstanding									13,467,000
Amortization Period (Years)								25 years
Mortgage loans | Compass Bank 3.17% Variable due May 6, 2020
Debt Instrument [Line Items]
Debt outstanding								$ 23,394,000	24,015,000
Interest Rate (as a percent)								3.17%
Amortization Period (Years)			25 years					25 years
Number of Properties Encumbered | Property								3
Loan amount			$ 25,000,000
Mortgage loans | Mortgage Loans with General Electric Capital Corporation
Debt Instrument [Line Items]
Number of loans | Loan				2
Mortgage loans | West Alliance Bank (formerly GE Capital Corp) 5.39% Fixed due April 1, 2020, one
Debt Instrument [Line Items]
Debt outstanding								$ 5,910,000	5,160,000
Interest Rate (as a percent)								5.39%
Amortization Period (Years)								25 years
Number of Properties Encumbered | Property								1
Fixed interest rate (as a percent)				5.39%
Mortgage loans | West Alliance Bank (formerly GE Capital Corp) 5.39% Fixed due April 1, 2020, two
Debt Instrument [Line Items]
Debt outstanding								$ 5,046,000	6,041,000
Interest Rate (as a percent)								5.39%
Amortization Period (Years)								25 years
Number of Properties Encumbered | Property								1
Mortgage loans | West Alliance Bank (formerly GE Capital Corp) Variable due April 1, 2018
Debt Instrument [Line Items]
Debt outstanding									5,852,000
Amortization Period (Years)								20 years
Prepayment penalties								$ 0
Mortgage loans | U.S. Bank, NA Variable due November 1, 2016
Debt Instrument [Line Items]
Debt outstanding									17,179,000
Interest Rate (as a percent)								6.22%
Amortization Period (Years)						30 years		30 years
Mortgage loans | U.S. Bank, NA 6.13% Fixed due November 11, 2021
Debt Instrument [Line Items]
Debt outstanding								$ 11,303,000	$ 11,567,000
Interest Rate (as a percent)								6.13%
Amortization Period (Years)					25 years			25 years
Number of Properties Encumbered | Property								1
Fixed interest rate (as a percent)					6.133%
Prepayment penalty period until July 26, 2015 | Mortgage loans | MetaBank 4.25% Fixed due August 1, 2018
Debt Instrument [Line Items]
Prepayment penalties (as a percent)							3.00%
Prepayment penalty period after July 26, 2015 until July 26 2017 | Mortgage loans | MetaBank 4.25% Fixed due August 1, 2018
Debt Instrument [Line Items]
Prepayment penalties (as a percent)							2.00%
Prepayment penalty period after July 26, 2017 until February 1, 2018 | Mortgage loans | MetaBank 4.25% Fixed due August 1, 2018
Debt Instrument [Line Items]
Prepayment penalties (as a percent)							1.00%
LIBOR | Mortgage loans | Bank Of Cascades Variable due December 19, 2024, Note A
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)		2.00%
LIBOR | Mortgage loans | Compass Bank 3.17% Variable due May 6, 2020
Debt Instrument [Line Items]
Interest rate margin on variable rate basis (as a percent)			2.40%
2014 acquisitions | Hilton Garden Inn | Houston, TX
Debt Instrument [Line Items]
Number of guestrooms | Room						182
2014 acquisitions | Hilton Garden Inn | Houston, TX | Mortgage loans | U.S. Bank, NA Variable due November 1, 2016
Debt Instrument [Line Items]
Debt assumed						$ 17,800,000
2014 acquisitions | Hampton Inn | Santa Barbara (Goleta), CA
Debt Instrument [Line Items]
Number of guestrooms | Room					98
2014 acquisitions | Hampton Inn | Santa Barbara (Goleta), CA | Mortgage loans | U.S. Bank, NA 6.13% Fixed due November 11, 2021
Debt Instrument [Line Items]
Debt assumed					$ 12,000,000