Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Percentage of taxable income distributed to the partnership (at least)	100.00%
Net deferred tax liability	$ 146,552	$ 166,978
Gross deferred income tax assets:
Net operating loss carryforwards	71,656	77,227
Basis difference - real estate property	8,490	48,983
Basis difference - intangibles	256	506
Other - temporary differences	24,341	40,220
Total gross deferred income tax assets	104,743	166,936
Valuation allowance	(51,439)	(46,302)
Total deferred income tax assets, net of valuation allowance	53,304	120,634
Gross deferred income tax liabilities:
Basis difference - real estate property	164,077	183,283
Basis difference - intangibles	6,855	65,920
Straight-line rent	5,340	1,597
Other - temporary differences	23,584	36,812
Total gross deferred income tax liabilities	199,856	287,612
Net deferred income tax liabilities	$ 146,552	$ 166,978