Debt Obligations (Details) (USD $)			3 Months Ended						3 Months Ended			3 Months Ended							0 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2012 Junior subordinated notes	Dec. 31, 2011 Junior subordinated notes	Sep. 30, 2012 Junior subordinated notes	Jun. 30, 2012 Junior subordinated notes	Dec. 31, 2012 Junior subordinated notes March 15, 2011 through July 31, 2012	Dec. 31, 2012 Junior subordinated notes August 1, 2012 through April 29, 2016	Dec. 31, 2012 Junior subordinated notes April 30, 2016 through April 30, 2036	Dec. 31, 2012 Mortgages payable	Sep. 30, 2012 Mortgages payable	Dec. 31, 2012 Wholly-owned subsidiary Line of credit	Dec. 31, 2011 Wholly-owned subsidiary Line of credit	Dec. 31, 2012 Wholly-owned subsidiary Line of credit Secured borrowings	Jun. 22, 2011 Wholly-owned subsidiary Line of credit Secured borrowings	Dec. 31, 2012 Wholly-owned subsidiary Line of credit Secured borrowings Minimum	Dec. 31, 2012 Wholly-owned subsidiary Line of credit Secured borrowings Maximum	Apr. 17, 2012 Wholly-owned subsidiary Line of credit Unsecured borrowings	Apr. 17, 2012 Wholly-owned subsidiary Line of credit Unsecured borrowings Maximum
Debt Obligations
Total debt obligations	$ 252,210,000	$ 206,684,000	$ 37,400,000		$ 37,400,000	$ 37,400,000				$ 214,810,000	$ 169,284,000
Maximum amount that may be borrowed under the facility															25,000,000			10,000,000
Borrowing base as a percent of receivables																40.00%	65.00%
Interest Rate (as a percent)							3.00%	4.90%								5.50%
Reference rate									LIBOR					LIBOR
Margin interest above reference rate (as a percent)									2.00%					4.00%
Conversion of secured line of credit at maturity, period of term loan														18 months
Borrowing period																			90 days
Other disclosures
Interest expense			458,000	281,000								38,000	37,000
Amortization of deferred costs included in interest expense			$ 5,000	$ 5,000