Income Taxes - Provision and Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current-
Current- Federal	$ 0	$ 0	$ 5
Current- State	1,631	1,435	1,647
Current- Foreign	2,380	200	150
Current tax	4,011	1,635	1,802
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Deferred- Foreign	9	(69)	143
Deferred tax	9	(69)	143
Income tax provision	4,020	1,566	1,945
Income tax expense	$ 4,020	$ 1,566	$ 1,945
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Taxes at statutory U.S. federal income tax rate (as a percent)	35.00%	35.00%	35.00%
Nontaxable income of HPT (as a percent)	(35.00%)	(35.00%)	(35.00%)
State and local income taxes, net of federal tax benefit (as a percent)	0.80%	0.80%	1.00%
Foreign taxes (as a percent)	1.00%	0.10%	0.10%
Change in valuation allowance (as a percent)	0.80%	3.70%	4.00%
Other differences, net (as a percent)	(0.80%)	(3.70%)	(3.90%)
Effective tax rate (as a percent)	1.80%	0.90%	1.20%