Advances And Other Assets Are Expected To Be Earned Repaid (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Other Assets [Line Items]
2013	$ 3,666,000
2014	1,279,000
2015	1,264,000
2016	922,000
2017 and beyond	2,305,000
Other Assets	$ 9,436,000	$ 6,140,000