CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)		6 Months Ended
	Feb. 04, 2020	Jun. 30, 2020	Jun. 30, 2019
Supplemental Disclosure of Cash Flows:
Income taxes paid, net of refunds received		$ 203,000	$ 1,400,000
Interest paid		5,636,000	5,067,000
Interest capitalized		0	0
Face amount of debt		278,849,781
Net cash provided by operating activities discontinued operations			7,600,000
Right-of-use assets		305,196
Lease liabilities		304,982
Increase in assets held for sale			140,927
Increase in liabilities held for sale			185,859
4.50% Convertible Senior Notes due 2020
Supplemental Disclosure of Cash Flows:
Debt conversion amount	$ 57,400,000
Face amount of debt	75,000,000.0
3.875% Convertible Senior Notes due 2025
Supplemental Disclosure of Cash Flows:
Debt conversion amount	57,400,000
Proceeds and payment on convertible notes	17,600,000
Face amount of debt	17,600,000	62,468,000
Convertible senior notes issuance amount allocated to equity component for the conversion option, net of tax effect	5,200,000
Convertible senior notes decrease in long-term debt for the conversion option	7,000,000
Convertible senior notes issuance increase in deferred income taxes for the tax effect on the amount allocated to equity component for the conversion option	$ 1,800,000
Real Estate Operations
Supplemental Disclosure of Cash Flows:
Net cash provided by operating activities discontinued operations			8,000,000.0
Golf Operations | Discontinued Operations, Held-for-sale
Supplemental Disclosure of Cash Flows:
Net cash provided by operating activities discontinued operations			$ 434,000
Increase in assets held for sale		208,000
Increase in liabilities held for sale		208,000
Accounting Standards Update 2016-02 | Restatement
Supplemental Disclosure of Cash Flows:
Right-of-use assets		681,000
Lease liabilities		$ 473,000