Debt - Components of Mortgage Debt (Footnotes) (Details) $ in Thousands							12 Months Ended
	Sep. 17, 2015	Dec. 17, 2014	Nov. 25, 2014 mortgage	Jul. 02, 2014	Jun. 09, 2014 mortgage	Mar. 21, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Participating Mortgage Loans [Line Items]
Loss on early extinguishment of debt | $							$ 412	$ 184	$ 933
Senior Unsecured Revolving Credit Facility | LIBOR | Minimum
Participating Mortgage Loans [Line Items]
Debt instrument, basis spread on variable rate							1.55%
Senior Unsecured Revolving Credit Facility | LIBOR | Maximum
Participating Mortgage Loans [Line Items]
Debt instrument, basis spread on variable rate							2.30%
Residence Inn by Marriott Garden Grove, CA
Participating Mortgage Loans [Line Items]
Loan term						10 years
Loans amortization payment term						30 years
Debt instrument, interest only term						12 months
Loss on early extinguishment of debt | $						$ 184
Silicon Valley I, Silicon Valley II, San Mateo and Mountain View Loans
Participating Mortgage Loans [Line Items]
Loans amortization payment term					30 years
Debt instrument, interest only term					60 months
Debt instrument, number of loans | mortgage					4
Debt instrument, term					10 years
SpringHill Suites by Marriott Savannah, GA
Participating Mortgage Loans [Line Items]
Loans amortization payment term				30 years
Debt instrument, interest only term				60 months
Debt instrument, term				10 years
Billerica And Carlsbad Hotel Loans
Participating Mortgage Loans [Line Items]
Loans amortization payment term			30 years
Debt instrument, interest only term			36 months
Debt instrument, number of loans | mortgage			2
Debt instrument, term			10 years
Hampton Inn & Suites Houston Medical Cntr., TX
Participating Mortgage Loans [Line Items]
Loan term		10 years
Loans amortization payment term		30 years
Debt instrument, interest only term		36 months
Hilton Garden Inn Marina del Rey, CA
Participating Mortgage Loans [Line Items]
Loans amortization payment term	30 years
Debt instrument, term	10 years