Debt (Details) - USD ($) $ in Thousands		Sep. 30, 2018		Sep. 05, 2018	Dec. 31, 2017		Oct. 13, 2017	Nov. 12, 2015
Debt Instrument [Line Items]
Total debt		$ 1,333,263			$ 885,237
Term Loan [Member]
Debt Instrument [Line Items]
Debt		775,000			675,000
Deferred financing costs, net		(3,913)			(4,594)
Total debt		771,087			670,406
First Term Loan [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt	[1]	300,000			300,000
Second Term Loan [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt		65,000	[1]		65,000	[1]	$ 65,000
Third Term Loan [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt	[1]	200,000			200,000
Fourth Term Loan [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt		110,000	[1]		110,000	[1]	$ 110,000
Fifth Term Loan [Member] [Member] | Term Loan [Member]
Debt Instrument [Line Items]
Debt		$ 100,000	[1]	$ 100,000	0	[1]
Series A Notes [Member]
Debt Instrument [Line Items]
Interest Rate		4.70%						4.70%
Series B Notes [Member]
Debt Instrument [Line Items]
Interest Rate		4.93%						4.93%
Unsecured Debt [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt		$ 394,000			45,000
Unsecured Debt [Member] | Senior Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt	[2]	394,000			45,000
Unsecured Debt [Member] | PHL Unsecured Revolving Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt	[3]	0			0
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Debt		100,000			100,000
Deferred financing costs, net		(555)			(626)
Total debt		99,445			99,374
Senior Unsecured Notes [Member] | Series A Notes [Member]
Debt Instrument [Line Items]
Debt		60,000			60,000
Senior Unsecured Notes [Member] | Series B Notes [Member]
Debt Instrument [Line Items]
Debt		40,000			40,000
Mortgages [Member]
Debt Instrument [Line Items]
Debt		68,809			70,573
Mortgage loan premiums and deferred financing costs		(78)			(116)
Total debt		$ 68,731			70,457
Mortgages [Member] | The Westin San Diego Gaslamp Quarter [Member]
Debt Instrument [Line Items]
Interest Rate		3.69%
Debt		$ 68,809			$ 70,573

[1] 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. At September 30, 2018 and December 31, 2017, the Company had interest rate swaps to effectively fix the interest rate for $600.0 million of its term loan facilities. See "Derivative and Hedging Activities" above.

[2] 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 applicable credit agreement) plus an applicable margin.

[3] Borrowings bear interest at floating rates equal to, at the Company's option, either (i) LIBOR plus an applicable margin or (ii) an Eurocurrency Rate (as defined in the applicable credit agreement) plus an applicable margin.