Commitments and Contingencies (Narrative and Schedule of Future Minimum Rental Payments for Operating Leases) (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
2014	$ 1,782,000		$ 1,782,000
2015	2,289,000		2,289,000
2016	1,685,000		1,685,000
2017	1,440,000		1,440,000
2018	1,364,000		1,364,000
2019 and thereafter	4,228,000		4,228,000
Rent expense			2,300,000	2,000,000	1,900,000
Aggregate future minimum payments due	12,800,000		12,800,000
Loss contingency, loss in period	21,200,000	17,500,000
Estimated litigation liability	21,200,000		21,200,000
Unfunded commitments to limited partnerships	24,400,000		24,400,000
Unfunded commitments to secured bank loans	$ 20,800,000		$ 20,800,000