Profit Participation Incentive Plan (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payments for Capital Improvements			$ 5,328,000	$ 51,167,000
General and administrative expenses	$ 2,868,000	$ 3,025,000	8,786,000	9,143,000
Other liabilities	13,341,000		13,341,000		$ 13,614,000
Deferred Profit Sharing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in accrued liabilities	(300,000)
Payments for Capital Improvements	100,000	200,000	300,000	600,000
General and administrative expenses	200,000	$ 200,000	400,000	$ 700,000
Other liabilities	$ 3,200,000		3,200,000		$ 2,500,000
Deferred compensation arrangement with individual, distribution paid			$ 0