Debt (Details Textual) - USD ($)										12 Months Ended
		Nov. 12, 2015	Nov. 06, 2015	Oct. 06, 2015	Jul. 10, 2015	Jun. 10, 2015	May. 19, 2015	Apr. 13, 2015	Mar. 05, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Line of Credit Facility [Line Items]
Proceeds from Issuance of Unsecured Debt										$ 100,000,000	$ 0	$ 0
Outstanding borrowings under the credit facility	[1]									165,000,000	50,000,000
Term loans	[2]									525,000,000	300,000,000
Unrealized gain (loss) on derivative instruments										(4,409,000)	(1,427,000)	1,386,000
Repayments of mortgage debt										171,488,000	9,123,000	8,099,000
Estimated fair value of debt										$ 465,400,000	503,900,000
Second Term Loan [Member]
Line of Credit Facility [Line Items]
Borrowing capacity								$ 100,000,000
Expiration date										Apr. 15, 2022
Proceeds from Issuance of Unsecured Debt								$ 100,000,000
Second Term Loan [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus								1.70%
Second Term Loan [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus								2.55%
Third Term Loan [Member]
Line of Credit Facility [Line Items]
Borrowing capacity						$ 125,000,000
Expiration date										Jan. 10, 2021
Proceeds from Issuance of Unsecured Debt					$ 125,000,000
Maximum borrowing capacity						$ 250,000,000
Third Term Loan [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus						1.45%
Third Term Loan [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus						2.20%
Series A Notes [Member]
Line of Credit Facility [Line Items]
Maturity date		Dec. 01, 2023								Dec. 01, 2023
Proceeds from Issuance of Senior Long-term Debt		$ 60,000,000
Stated interest rate										4.70%
Series B Notes [Member]
Line of Credit Facility [Line Items]
Maturity date		Dec. 01, 2025								Dec. 01, 2025
Proceeds from Issuance of Senior Long-term Debt		$ 40,000,000
Stated interest rate										4.93%
The Nines Hotel Portland [Member]
Line of Credit Facility [Line Items]
Repayments of mortgage debt									$ 50,700,000
Inter Continental Buckhead Hotel [Member]
Line of Credit Facility [Line Items]
Repayments of mortgage debt				$ 48,600,000
Skamania Lodge [Member]
Line of Credit Facility [Line Items]
Repayments of mortgage debt			$ 28,900,000
Double Tree By Hilton Bethesda Washington DC [Member]
Line of Credit Facility [Line Items]
Repayments of mortgage debt			$ 34,100,000
Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Notional amount										$ 300,000,000
Derivative Asset										400,000
Aggregate liability										5,100,000
Reclassification from AOCI to interest expense										5,400,000	600,000	500,000
Expected reclassifications in next 12 months										$ 4,700,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Expiration date	[1]									Jan. 15, 2019
Revolving Credit Facility [Member] | Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Increase in borrowing capacity							$ 150,000,000
Borrowing capacity							$ 750,000,000			$ 450,000,000
Maximum borrowing capacity										1,000,000,000
Outstanding borrowings under the credit facility										165,000,000	50,000,000
Line of Credit Facility, Remaining Borrowing Capacity										285,000,000
Unused commitment fees										$ 600,000	700,000	700,000
Revolving Credit Facility [Member] | Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Annual rate of unused commitment fee										0.20%
Revolving Credit Facility [Member] | Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus										1.55%
Revolving Credit Facility [Member] | Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Annual rate of unused commitment fee										0.30%
Revolving Credit Facility [Member] | Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus										2.30%
Term Loan [Member]
Line of Credit Facility [Line Items]
Expiration date										Jan. 15, 2020
Term Loan [Member] | First Term Loan [Member]
Line of Credit Facility [Line Items]
Term loans	[2]									$ 300,000,000	300,000,000
Term Loan [Member] | First Term Loan [Member] | Minimum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus										1.50%
Term Loan [Member] | First Term Loan [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus										2.25%
Term Loan [Member] | Second Term Loan [Member]
Line of Credit Facility [Line Items]
Term loans	[2]									$ 100,000,000	0
Term Loan [Member] | Third Term Loan [Member]
Line of Credit Facility [Line Items]
Term loans	[2]									$ 125,000,000	0
Term Loan [Member] | Interest Rate Swap [Member] | Second Term Loan [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate										3.46%
Term Loan [Member] | Interest Rate Swap [Member] | Third Term Loan [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate										3.29%
Term Loan [Member] | Interest Rate Swap [Member] | Term Loan Through July 12, 2017 [Member]
Line of Credit Facility [Line Items]
Effective interest rate										2.93%
Term Loan [Member] | Interest Rate Swap [Member] | Term Loan July 13, 2017 through January 15, 2020 [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate										3.51%
Term Loan [Member] | Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Borrowing capacity										$ 300,000,000
AOCI Attributable to Parent [Member]
Line of Credit Facility [Line Items]
Unrealized gain (loss) on derivative instruments										$ (4,409,000)	$ (1,427,000)	$ 1,386,000

[1] Borrowings bear interest at floating rates equal to, at the Company's option, either (i) LIBOR plus an applicable margin or (ii) an Adjusted Base Rate (as defined in the senior unsecured credit agreement) plus an applicable margin. The Company has two six-month extension options.

[2] Borrowings under the term loan facilities bear interest at floating rates equal to, at the Company's option, either (i) LIBOR plus an applicable margin or (ii) a Base Rate plus an applicable margin. The Company entered into interest rate swaps to effectively fix the interest rate for the First Term Loan, the Second Term Loan and the Third Term Loan. At December 31, 2015 and December 31, 2014, the Company had interest rate swaps on the full amounts outstanding. See "Derivative and Hedging Activities" above.