Discontinued Operations - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of discontinued operations	$ 16,092,000	$ 4,927,000	$ 38,474,000	$ 4,927,000
Income (Loss) from Continuing Operations Attributable to Parent	15,800,000	8,400,000	45,700,000	22,800,000
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	15,100,000	5,400,000	37,200,000	7,300,000
Income (Loss) from Continuing Operations Attributable to Noncontrolling Interest	500,000	400,000	1,900,000	800,000
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest	$ 700,000	$ 300,000	$ 1,800,000	$ 400,000
Cedar Mill [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	276		276
Kenwood Club [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	320		320
Celery Stalk [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	410		410
Westbury Springs [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	150		150
Hidden Lake [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	320		320
Park Walk [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	124		124
Paddock Club Florence [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	200		200
Fairways At Royal Oak [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	214		214
Walden Run [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Unit Affected	240		240