Fair Value Measurements and Interest Rate Derivatives - Fair Value Measurements (Details) $ in Thousands	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2011 item
Assets:
Interest rate derivatives	$ 1,419	$ 1,749
Former Chairman
Liabilities:
Number of installments to be paid out under the Retirement Benefit Agreement | item			10
Total amount paid to date under the Retirement Benefit Agreement	1,400
Level 2
Assets:
Life insurance policy	647	861
Total assets	2,066	2,610
Liabilities:
Retirement benefit agreement	647	861
Total liabilities	647	861
Level 2 | Hilton San Diego Bayfront new interest rate cap
Assets:
Interest rate derivatives	2
Level 2 | Interest Rate Swap
Assets:
Interest rate derivatives	1,417	1,749
Total at the end of the period
Assets:
Life insurance policy	647	861
Total assets	2,066	2,610
Liabilities:
Retirement benefit agreement	647	861
Total liabilities	647	861
Total at the end of the period | Hilton San Diego Bayfront new interest rate cap
Assets:
Interest rate derivatives	2
Total at the end of the period | Interest Rate Swap
Assets:
Interest rate derivatives	$ 1,417	$ 1,749