Notes Payable (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019 USD ($) property	Dec. 31, 2018 USD ($) property
Notes payable
Total notes payable	$ 980,996	$ 982,828
Current portion of notes payable	8,030	7,804
Less: current portion of deferred financing costs	(1,966)	(1,966)
Current portion of notes payable, net	6,064	5,838
Notes payable, less current portion	972,966	975,024
Less: long-term portion of deferred financing costs	(3,309)	(3,799)
Carrying value of notes payable, less current portion	$ 969,657	$ 971,225
Notes payable maturing in various years
Notes payable
Number of hotels provided as collateral \| property	4	4
Total notes payable	$ 335,996	$ 337,828
Notes payable maturing in various years \| Minimum
Notes payable
Fixed interest rate (as a percent)	4.12%	4.12%
Debt maturity date	Nov. 01, 2020	Nov. 01, 2020
Notes payable maturing in various years \| Maximum
Notes payable
Fixed interest rate (as a percent)	5.95%	5.95%
Debt maturity date	Jan. 06, 2025	Jan. 06, 2025
Hilton San Diego Bayfront mortgage payable
Notes payable
Number of hotels provided as collateral \| property	1	1
Debt maturity date	Dec. 09, 2020	Dec. 09, 2020
Interest rate, description of reference rate	one-month LIBOR	one-month LIBOR
Interest rate added to base rate (as a percent)	1.05%	1.05%
Number of extension periods available for secured debt	3	3
Term of extension period for secured debt	1 year	1 year
Total notes payable	$ 220,000	$ 220,000
$85.0 million term loan
Notes payable
Debt maturity date	Sep. 03, 2022	Sep. 03, 2022
Term loan total interest rate, including effect of swap agreement	2.941%	2.941%
Total notes payable	$ 85,000	$ 85,000
$85.0 million term loan \| Minimum
Notes payable
Interest rate added to base rate (as a percent)	1.35%	1.35%
$85.0 million term loan \| Maximum
Notes payable
Interest rate added to base rate (as a percent)	2.20%	2.20%
$100.0 million term loan
Notes payable
Debt maturity date	Jan. 31, 2023	Jan. 31, 2023
Term loan total interest rate, including effect of swap agreement	3.203%	3.203%
Total notes payable	$ 100,000	$ 100,000
$100.0 million term loan \| Minimum
Notes payable
Interest rate added to base rate (as a percent)	1.35%	1.35%
$100.0 million term loan \| Maximum
Notes payable
Interest rate added to base rate (as a percent)	2.20%	2.20%
Series A Senior Notes
Notes payable
Fixed interest rate (as a percent)	4.69%	4.69%
Debt maturity date	Jan. 10, 2026	Jan. 10, 2026
Total notes payable	$ 120,000	$ 120,000
Series B Senior Notes
Notes payable
Fixed interest rate (as a percent)	4.79%	4.79%
Debt maturity date	Jan. 10, 2028	Jan. 10, 2028
Total notes payable	$ 120,000	$ 120,000
Not designated as hedging instrument \| Interest Rate Cap \| Hilton San Diego Bayfront mortgage payable
Notes payable
Interest rate, description of reference rate	one-month LIBOR	one-month LIBOR
Not designated as hedging instrument \| Interest Rate Swap \| $85.0 million term loan
Notes payable
Interest rate, description of reference rate	one-month LIBOR	one-month LIBOR
Fixed rate under interest rate swap agreement	1.591%	1.591%
Not designated as hedging instrument \| Interest Rate Swap \| $100.0 million term loan
Notes payable
Interest rate, description of reference rate	one-month LIBOR	one-month LIBOR
Fixed rate under interest rate swap agreement	1.853%	1.853%

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Represents the number of extension periods available for secured debt.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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

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Fixed interest rate related to the interest rate derivative.

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Variable interest rate in effect as of the balance sheet date related to the interest rate derivative.

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Sum of the carrying values as of the balance sheet date of the portions of long-term notes payable due within one year or the operating cycle if longer.

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