Summary of Significant Accounting Policies Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accounting Policies [Abstract]
Fixed assets	$ 12,948	$ 15,445
Net operating losses	359	357
Deferred Tax Asset, Start-up Costs	347	0
Start-up costs	457	213
Total deferred tax assets	14,111	16,015
Deferred Tax Liabilities, Capital Improvements	(2,079)	(2,006)
Straight-line receivable	(1,271)	(1,891)
Other	(1)	0
Total deferred tax liabilities	(3,351)	(3,897)
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Current TRS Tax Expense (benefit)	(221)	(163)	$ (36)
Current state income tax expense	(422)	(360)	(414)
Current foreign income tax	0	(36)	(77)
Current foreign withholding tax	(1,069)	(1,071)	(1,130)
Deferred TRS Income Tax Expense (Benefit)	319	137	273
Deferred foreign withholding tax	0	43	39
Deferred income tax benefit (expense)	(892)	(949)	792
Income tax expense	(2,285)	(2,399)	$ (553)
Deferred Tax Assets, Net	$ 10,760	$ 12,118