Debt (Details Textual) (USD $)	3 Months Ended			9 Months Ended					9 Months Ended							9 Months Ended		0 Months Ended
	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Dec. 31, 2013		Sep. 30, 2014 Minimum [Member]	Sep. 30, 2014 Maximum [Member]	Sep. 30, 2014 credit facility [Member]	Sep. 30, 2014 Revolving facility [Member]	Sep. 30, 2014 Term Loan [Member]	Aug. 13, 2012 Term Loan [Member]	Sep. 30, 2014 Term Loan [Member]	Sep. 30, 2014 Accumulated Other Comprehensive Income (Loss) [Member]	Sep. 30, 2013 Accumulated Other Comprehensive Income (Loss) [Member]	Jul. 17, 2014 The Nines Hotel Portland [Member]	Jul. 17, 2014 The Nines Hotel Portland [Member]	Sep. 30, 2014 First Mortgage [Member] The Nines Hotel Portland [Member]
Line of Credit Facility [Line Items]
Senior unsecured revolving credit facility														$ 100,000,000	$ 100,000,000
Credit facility maturity date				Jul. 31, 2016
Credit facility maturity extension option				1 year
Line of Credit Facility, Maximum Borrowing Capacity	600,000,000			600,000,000							300,000,000	200,000,000
Credit facility borrowings LIBOR rate plus									1.75%	2.50%
Annual rate of unused commitment fee									0.25%	0.35%
Outstanding borrowings under the credit facility	0			0			0
Unused commitment fees	100,000		200,000	400,000		500,000
Notional Amount of Interest Rate Cash Flow Hedge Derivatives	100,000,000			100,000,000
Debt Instrument, Interest Rate, Stated Percentage													2.55%						7.39%	7.39%
Derivative Asset, Fair Value	1,000,000			1,000,000
Unrealized gain (loss) on derivative instruments	446,000		(589,000)	(132,000)		1,211,000										(132,000)	1,211,000
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	100,000		100,000	400,000		400,000
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred				400,000
Estimated fair value of debt	505,000,000			505,000,000			460,900,000
Loans Assumed				50,725,000		90,448,000												50,700,000
Debt Instrument, Unamortized Premium	$ 4,913,000	[1]		$ 4,913,000	[1]		$ 5,888,000	[1]											$ 900,000

[1] (3) Loan premiums on assumed mortgages recorded in purchase accounting for the Hotel Palomar San Francisco, Embassy Suites San Diego Bay - Downtown, Hotel Modera and The Nines Hotel.