CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 625	$ 4,188
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	2,255	1,953
Stock based compensation	232	19
(Loss) gain on sale of investments	1,078	(3,122)
Unrealized loss on investments, net	538	0
Other-than-temporary impairment loss	63	366
Deferred income tax (benefit) expense	(550)	988
Cost of real estate sold	3,943	174
Expenditures for and acquisition of real estate to be sold	(3,045)	(2,183)
Accretion income and other	(524)	(1,208)
Loss on disposal of property and equipment	(7)	0
Changes in operating assets and liabilities:
Notes receivable	(943)	40
Other assets	1,256	651
Other liabilities	(2,999)	4,928
Income taxes receivable	0	348
Net cash provided by operating activities	1,936	7,142
Cash flows from investing activities:
Expenditures for operating property	(3,914)	(4,310)
Expenditures for property and equipment	(590)	(1,026)
Proceeds from the disposition of assets	5,000	0
Purchases of investments - debt securities	(20)	(36,910)
Purchases of investments - equity securities	(10,442)	(12,600)
Sales of investments - debt securities	31,958	48,729
Sales of investments - equity securities	0	8,324
Maturities of assets held by special purpose entities	415	415
Net cash provided by investing activities	22,407	2,622
Cash flows from financing activities:
Capital contribution from non-controlling interest	64	0
Repurchase of common shares	(13,695)	(34,156)
Borrowings on debt	33	509
Principal payments for debt	(215)	(226)
Debt issue costs	(27)	(20)
Net cash used in financing activities	(13,840)	(33,893)
Net increase (decrease) in cash, cash equivalents and restricted cash	10,503	(24,129)
Cash, cash equivalents and restricted cash at beginning of the period	192,365	243,087
Cash, cash equivalents and restricted cash at end of the period	202,868	218,958
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	202,585	216,982
Restricted cash included in other assets	283	1,976
Cash paid during the period for:
Interest	5,128	5,137
Income taxes	2,005	0
Non-cash financing and investing activities:
Increase in Community Development District debt	15	194
Increase in expenditures for operating properties and property and equipment financed through accounts payable	$ 818	$ 1,206