CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ 59,236,000	$ 15,464,000	$ (1,971,000)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation, depletion and amortization	8,885,000	8,571,000	9,486,000
Stock based compensation	76,000	131,000	150,000
Gain on sale of investments	(10,750,000)	(795,000)	(5,311,000)
Other-than-temporary impairment loss on investments	2,288,000	0	0
Deferred income tax (benefit) expense	(17,375,000)	29,627,000	2,323,000
Impairment losses on investment in real estate	714,000	357,000	0
Loss on disposal of real estate and property and equipment	887,000	9,000	77,000
Gain on sale of vacation rental management	(9,800,000)	0	0
Cost of real estate sold	13,727,000	6,489,000	14,584,000
Expenditures for and acquisition of real estate to be sold	(8,475,000)	(8,335,000)	(8,378,000)
Accretion income and other	(3,159,000)	(2,792,000)	(1,780,000)
Changes in operating assets and liabilities:
Notes receivable	(2,596,000)	694,000	21,780,000
Claim settlement receivable	2,741,000	(7,804,000)	0
Other assets	(3,667,000)	(1,576,000)	(3,650,000)
Other liabilities	4,734,000	(2,384,000)	(3,395,000)
Income taxes receivable	18,300,000	(24,782,000)	(1,497,000)
Net cash provided by operating activities	55,766,000	12,874,000	22,418,000
Cash flows from investing activities:
Expenditures for operating property	(28,400,000)	(3,226,000)	(6,619,000)
Expenditures for property and equipment	(3,005,000)	(1,297,000)	(2,468,000)
Proceeds from the disposition of assets	2,518,000	3,000	0
Purchases of investments	(115,944,000)	(357,787,000)	(341,994,000)
Maturities of investments	13,988,000	185,000,000	410,000,000
Sales of investments	174,507,000	197,548,000	385,695,000
Maturities of assets held by special purpose entities	787,000	787,000	787,000
Net cash provided by investing activities	44,451,000	21,028,000	445,401,000
Cash flows from financing activities:
Capital contribution from non-controlling interest	193,000	10,353,000	0
Capital distribution to non-controlling interest	(2,330,000)	(600,000)	(68,000)
Repurchase of common shares	(147,422,000)	(14,820,000)	(305,004,000)
Borrowings on debt	1,624,000	0	48,200,000
Principal payments for debt	(1,290,000)	(497,000)	(31,942,000)
Debt issuance costs	(20,000)	0	(747,000)
Net cash used in financing activities	(149,245,000)	(5,564,000)	(289,561,000)
Net (decrease) increase in cash and cash equivalents	(49,028,000)	28,338,000	178,258,000
Cash and cash equivalents at beginning of the year	241,111,000	212,773,000	34,515,000
Cash and cash equivalents at end of the year	192,083,000	241,111,000	212,773,000
Cash paid during the period for:
Interest	11,823,000	11,811,000	10,569,000
Income taxes	5,430,000	2,302,000	0
Non-cash financing and investment activities:
Increase in notes receivable - PCR Note	(5,000,000)	0	0
Increase (decrease) in Community Development District debt	174,000	955,000	(768,000)
Decrease in pledged treasury securities related to defeased debt	0	0	(25,670,000)
Expenditures for operating properties and property and equipment financed through accounts payable	$ 2,525,000	$ 139,000	$ 1,138,000