Debt (Details Textual)				3 Months Ended		6 Months Ended
	Jun. 01, 2017 USD ($)	Mar. 01, 2017 USD ($)	Nov. 12, 2015 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) extension_option	Jun. 30, 2016 USD ($)	May 17, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 05, 2016 USD ($)	Jun. 10, 2015 USD ($)	May 19, 2015 USD ($)	Apr. 13, 2015 USD ($)
Line of Credit Facility [Line Items]
Outstanding borrowings under the credit facility				$ 43,000,000		$ 43,000,000			$ 82,000,000
Unrealized gain (loss) on derivative instruments				(1,293,000)	$ (4,635,000)	811,000	$ (16,119,000)
Gain (Loss) on derivative instruments				(100,000)	(100,000)	0	(1,872,000)
Repayments of mortgage debt						71,170,000	88,939,000
Estimated fair value of debt				170,800,000		170,800,000			242,900,000
Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Derivative Asset				1,300,000		1,300,000
Derivative Liability				2,500,000		2,500,000
Reclassification from AOCI to interest expense				700,000	1,600,000	1,800,000	3,200,000
Expected reclassifications in next 12 months				2,500,000		2,500,000
First Term Loan [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Notional amount				300,000,000		300,000,000
Second Term Loan [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity									175,000,000				$ 100,000,000
Accordion feature (potential increase)													$ 200,000,000
Second Term Loan [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Notional amount				100,000,000		$ 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%
Second Term Loan, Excluded from Interest Rate Swap [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, Excluded from Interest Rate Swap [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]
Maximum borrowing capacity										$ 200,000,000	$ 125,000,000
Accordion feature (potential increase)											$ 250,000,000
Third Term Loan [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Notional amount				$ 200,000,000		$ 200,000,000
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]
Proceeds from issuance of senior long-term debt			$ 60,000,000
Stated interest rate				4.70%		4.70%
Series B Notes [Member]
Line of Credit Facility [Line Items]
Proceeds from issuance of senior long-term debt			$ 40,000,000
Stated interest rate				4.93%		4.93%
Revolving Credit Facility [Member] | Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Debt outstanding				$ 43,000,000		$ 43,000,000			82,000,000
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				450,000,000		450,000,000						$ 750,000,000
Accordion feature (potential increase)				1,000,000,000.0		1,000,000,000.0
Outstanding borrowings under the credit facility				43,000,000		43,000,000			82,000,000
Debt outstanding				43,000,000		43,000,000			82,000,000
Line of credit facility, remaining borrowing capacity				407,000,000		407,000,000
Unused commitment fees				100,000	$ 200,000	$ 400,000	$ 400,000
Number of extension options | extension_option						2
Extension option duration						6 months
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Annual rate of unused commitment fee						0.20%
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member] | Unsecured Debt [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] | Senior Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Annual rate of unused commitment fee						0.30%
Revolving Credit Facility [Member] | Senior Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member] | Maximum [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Credit facility borrowings LIBOR rate plus						2.30%
Revolving Credit Facility [Member] | PHL Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity								$ 10,000,000
Outstanding borrowings under the credit facility									0
Debt outstanding				0		$ 0			0
Line of credit facility, remaining borrowing capacity				10,000,000		$ 10,000,000
Revolving Credit Facility [Member] | PHL Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Annual rate of unused commitment fee						0.20%
Revolving Credit Facility [Member] | PHL Unsecured Revolving Credit Facility [Member] | Unsecured Debt [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] | PHL Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Annual rate of unused commitment fee						0.30%
Revolving Credit Facility [Member] | PHL Unsecured Revolving Credit Facility [Member] | Unsecured Debt [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]
Debt outstanding				675,000,000		$ 675,000,000			675,000,000
Term Loan [Member] | Senior Unsecured Revolving Credit Facility [Member] | Unsecured Debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity				300,000,000.00		300,000,000.00
Term Loan [Member] | First Term Loan [Member]
Line of Credit Facility [Line Items]
Debt outstanding				300,000,000		$ 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]
Debt outstanding				$ 175,000,000		$ 175,000,000			175,000,000
Term Loan [Member] | Second Term Loan [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Effective interest rate				3.46%		3.46%
Term Loan [Member] | Second Term Loan, Excluded from Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Term loans outstanding				$ 75,000,000		$ 75,000,000			75,000,000
Term Loan [Member] | Third Term Loan [Member]
Line of Credit Facility [Line Items]
Debt outstanding				$ 200,000,000		$ 200,000,000			200,000,000
Term Loan [Member] | Third Term Loan [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Effective interest rate				3.21%		3.21%
Term Loan [Member] | Term Loan Through July 12, 2017 [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Effective interest rate				2.93%		2.93%
Term Loan [Member] | Term Loan July 13, 2017 through January 15, 2020 [Member] | Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Effective interest rate				3.51%		3.51%
First Mortgage [Member]
Line of Credit Facility [Line Items]
Debt outstanding				$ 71,720,000		$ 71,720,000			142,890,000
First Mortgage [Member] | Sofitel Philadelphia [Member]
Line of Credit Facility [Line Items]
Debt outstanding				$ 0		$ 0			44,320,000
Stated interest rate				3.90%		3.90%
Repayments of mortgage debt		$ 44,100,000
First Mortgage [Member] | Hotel Zelos San Francisco [Member]
Line of Credit Facility [Line Items]
Debt outstanding				$ 0		$ 0			$ 25,718,000
Stated interest rate				5.94%		5.94%
Repayments of mortgage debt	$ 25,500,000