GENERAL - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014 Property	Mar. 31, 2013	Sep. 30, 2013 Litigation Funding Agreement [Member]	Mar. 31, 2014 Stock Options [Member]	Mar. 31, 2013 Stock Options [Member]	Mar. 31, 2014 Finance Leases Financing Receivable [Member]	Mar. 31, 2013 Finance Leases Financing Receivable [Member]	Mar. 31, 2013 Reclassifications [Member]	Mar. 31, 2014 Level 3 inputs [Member]	Mar. 31, 2014 Level 3 inputs [Member] Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2013 Level 3 inputs [Member] Fair Value, Measurements, Nonrecurring [Member]	Dec. 31, 2012 Level 3 inputs [Member] Fair Value, Measurements, Nonrecurring [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Legal settlements received			$ 25,096,000
Accounts Receivable, Fair Value Disclosure												2,972,000
Impaired real estate assets measured at fair value										2,859,000	9,590,000
Number of real estate properties held for sale	89
Impairment charges	1,663,000	3,984,000				0	0
Assumed holding periods for unobservable inputs									15 years
Assumed annual average rent increases for unobservable inputs									2.00%
Rate of income capitalization for unobservable inputs									8.00%
Cash flows discounted rate for unobservable inputs									7.00%
Anti-dilutive securities Excluded from calculation of EPS				5,000	5,000
Cash dividends	8,423,000	4,202,000
Cash dividends per share	$ 0.250	$ 0.125
Payment of regular quarterly cash dividend	6,738,000	6,738,000
Payment of special cash dividend	1,685,000	1,685,000
Regular quarterly cash dividends paid per share	$ 0.20	$ 0.20
Special cash dividends paid per share	$ 0.05	$ 0.05
Rental property expenses	5,879,000	7,389,000						222,000
Adjustment to decrease in net earnings	$ 420,000