Income Taxes (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018
Income Taxes
Percentage of income distributed (at least)		100.00%
Net deferred tax liability		$ 143,365	$ 146,552
Effective Income Tax Rate	21.00%
Gross deferred income tax assets:
Net operating loss carryforwards		63,280	71,656
Basis difference - real estate property		9,955	8,490
Basis difference - intangibles		1,071	256
Other - temporary differences		19,028	24,341
Total gross deferred income tax assets		93,334	104,743
Valuation allowance		(40,795)	(51,439)
Total deferred income tax assets, net of valuation allowance		52,539	53,304
Gross deferred income tax liabilities:
Basis difference - real estate property		162,095	164,077
Basis difference - equity investments		4,000
Basis difference - intangibles		1,547	6,855
Straight-line rent		8,044	5,340
Other - temporary differences		20,218	23,584
Total gross deferred income tax liabilities		195,904	199,856
Deferred Tax Liabilities, Net, Total		$ 143,365	$ 146,552