Organization and Summary of Significant Accounting Policies (Changes in Carrying Amount of Goodwill) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Dec. 31, 2012
Goodwill [Roll Forward]
Basis, Balance, beginning of period	$ 6,735	$ 6,735	$ 8,229
Basis, Changes in Goodwill	(137)	0	(1,494)
Basis, Balance, end of period	6,322	6,735	6,735
Accumulated Amortization, Balance, beginning of period	1,073	1,073	1,073
Accumulated Amortization, Changes in Goodwill	0	0
Accumulated Amortization, Balance, end of period	1,073	1,073	1,073
Goodwill	5,249	5,662	$ 5,662		$ 7,156
Goodwill, Impairment Loss	(276)
Total, Changes in Goodwill		$ 0
Palmer Park Mall [Member]
Goodwill [Roll Forward]
Goodwill, Impairment Loss	$ (276)
Springfield Park [Member]
Goodwill [Line Items]
Goodwill divested				$ 100