Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 11,455	$ 120,615
Adjustments to reconcile net income to net cash provided by operating activities:
Income from discontinued operations, net	(6,862)	(122,187)
Deferred income taxes	22,458	(4,728)
Depreciation, depletion and amortization	3,082	4,719
Equity in loss of joint ventures	536	23
Gain on sale of equipment and property	(531)	(12)
Stock-based compensation	57	1,152
Realized gain on available for sale investments	(447)	0
Net changes in operating assets and liabilities:
Accounts receivable	(219)	(33)
Deferred costs and other assets	(1,092)	(660)
Accounts payable and accrued liabilities	(670)	910
Income taxes payable and receivable	(17,352)	3,690
Other long-term liabilities	187	(239)
Net cash provided by operating activities of continuing operations	10,602	3,250
Net cash (used in) provided by operating activities of discontinued operations	(2,441)	3,765
Net cash provided by operating activities	8,161	7,015
Cash flows from investing activities:
Investments in properties	(8,176)	(1,419)
Investments in joint ventures	(6,592)	(4,671)
Purchases of investments available for sale	(33,846)	0
Proceeds from sales of investments available for sale	79,937	0
Proceeds from the sale of assets	8,153	12
Cash held in escrow	(19,864)	(278,240)
Net cash provided by (used in) investing activities of continuing operations	19,612	(284,318)
Net cash provided by investing activities of discontinued operations	11,526	335,996
Net cash provided by investing activities	31,138	51,678
Cash flows from financing activities:
Distribution to noncontrolling interest	(510)	(510)
Repayment of long-term debt	0	(1,552)
Repurchase of Company Stock	(5,312)	0
Exercise of employee stock options	145	540
Net cash used in financing activities of continuing operations	(5,677)	(1,522)
Net cash used in financing activities of discontinued operations	0	(28,846)
Net cash used in financing activities	(5,677)	(30,368)
Net increase in cash and cash equivalents	33,622	28,325
Cash and cash equivalents at beginning of year	22,547	4,524
Cash and cash equivalents at end of the period	$ 56,169	$ 32,849