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Debt Instrument, Fair Value Adjustment, Net

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Line of credit, future borrowing capacity if extended

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Represents the number of assets encumbered.

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Repayments of Senior Notes

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Unamortized debt issuance costs on term loans

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The gross amount of unsecured debt at the balance sheet date

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Percentage of principal amount of debt redeemed.

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No definition available.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of uncollateralized debt obligations (with maturities initially due after one year or beyond the operating cycle if longer).

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Debt (Senior Notes, Term Loans, and Revolver) (Details)	3 Months Ended		9 Months Ended
Debt (Senior Notes, Term Loans, and Revolver) (Details)	Sep. 30, 2019 USD ($) asset	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) asset	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Debt
Repayments of Senior Notes			$ 0	$ 539,025,000
Gain (Loss) on Extinguishment of Debt	$ 0	$ (1,656,000)	0	6,010,000
Debt, net	2,199,301,000		2,199,301,000		$ 2,202,676,000
Unsecured Debt, Gross	1,175,000,000		1,175,000,000		1,175,000,000
Unamortized debt issuance costs on term loans	$ (4,562,000)		$ (4,562,000)		(5,835,000)
Secured Debt [Member]
Debt
Number of Assets Encumbered \| asset	19		19
Six Point Zero Zero Percent Due June 2025 [Member] \| Unsecured Debt [Member]
Debt
Number of Assets Encumbered \| asset	0		0
Debt Instrument, Interest Rate, Stated Percentage	6.00%		6.00%
Long-term Debt, Gross	$ 501,778,000		$ 501,778,000		505,322,000
Senior Unsecured Notes [Member]
Debt
Debt Instrument, Redemption Price, Percentage			103.00%
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed			105.00%
Senior Unsecured Notes [Member] \| Unsecured Debt [Member]
Debt
Debt Instrument, Fair Value Adjustment, Net	26,800,000		$ 26,800,000		30,300,000
The Revolver \| Line of Credit
Debt
Maximum borrowing capacity	600,000,000.0		$ 600,000,000.0
Additional maturity term			1 year
Unsecured Debt	$ 0		$ 0		0
Interest Rate	3.52%		3.52%
Remaining borrowing capacity					600,000,000.0
Line of credit, future borrowing capacity if extended			$ 750,000,000.0
$400 Million Term Loan Maturing 2023 \| Unsecured Debt [Member]
Debt
Maximum borrowing capacity	$ 400,000,000.0		400,000,000.0
Unsecured Debt	$ 400,000,000		$ 400,000,000		400,000,000
Interest Rate	3.78%		3.78%
$225 Million Term Loan Maturing 2023 \| Unsecured Debt [Member]
Debt
Maximum borrowing capacity	$ 225,000,000.0		$ 225,000,000.0
Unsecured Debt	$ 225,000,000		$ 225,000,000		225,000,000
Interest Rate	3.78%		3.78%
$400 Million Term Loan Maturing 2021 \| Unsecured Debt [Member]
Debt
Maximum borrowing capacity	$ 400,000,000.0		$ 400,000,000.0
Unsecured Debt	$ 400,000,000		$ 400,000,000		400,000,000
Interest Rate	2.97%		2.97%
$150 Million Term Loan Maturing 2022 \| Unsecured Debt [Member]
Debt
Maximum borrowing capacity	$ 150,000,000.0		$ 150,000,000.0
Unsecured Debt	$ 150,000,000		$ 150,000,000		150,000,000
Interest Rate	3.08%		3.08%
Embassy Suites Boston Marlborough & Sheraton Philadelphia Society Hill [Member]
Debt
Gain (Loss) on Extinguishment of Debt				$ 5,100,000
Prepaid expenses and other assets
Debt
Deferred financing costs	$ 600,000		$ 600,000		1,500,000
Fair Value, Inputs, Level 3 [Member] \| Secured Debt [Member]
Debt
Secured Debt	527,085,000		527,085,000		528,189,000
Fair Value, Inputs, Level 3 [Member] \| Unsecured Debt [Member]
Debt
Unsecured Debt	$ 1,170,438,000		$ 1,170,438,000		$ 1,169,165,000