Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities
Net (loss) income	$ (880)	$ 14,090
Adjustments to reconcile net (loss) income to net cash provided by operating activities
Depreciation and amortization	2,328	6,504
Stock-based compensation	491	8,472
Equity in (income) loss of unconsolidated joint ventures	11	24
Deferred income tax (benefit) expense	647	9,589
Impairment losses		782
Cost of operating properties sold	7,162	1,167
Expenditures for operating properties	(8,296)	(4,234)
Pension charges	(247)
Changes in operating assets and liabilities:
Notes receivable	440	524
Other assets	139	(185)
Accounts payable and accrued liabilities	1,836	1,445
Income taxes payable		(732)
Net cash provided by operating activities	3,631	37,446
Cash flows from investing activities:
Purchases of property, plant and equipment	(189)	(288)
Proceeds from disposition of property, plant and equipment	8
Net cash (used in) investing activities	(181)	(288)
Cash flows from financing activities:
Repayments of other long-term debt		(166)
Excess (reduction in) tax benefits from stock-based compensation		53
Taxes paid on behalf of employees related to stock-based compensation	(152)	(4,646)
Net cash (used in) financing activities	(152)	(4,759)
Net increase (decrease) in cash and cash equivalents	3,298	32,399
Cash and cash equivalents at beginning of period	162,391	183,827
Cash and cash equivalents at end of period	$ 165,689	$ 216,226