Condensed Consolidated Statements Of Financial Condition (Parenthetical) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Restricted cash	$ 58,388	$ 59,365
Notes receivable, net	$ 417,820	$ 415,598
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Redeemable Cumulative Preferred Stock, dividend rate	5.00%	5.00%
Redeemable Cumulative Preferred Stock, par value	$ 0.01	$ 0.01
Redeemable Cumulative Preferred Stock, shares authorized	15,000	15,000
Redeemable Cumulative Preferred Stock, shares issued	15,000	15,000
Redeemable Cumulative Preferred Stock, shares outstanding	15,000	15,000
Stated value of redeemable cumulative preferred stock	$ 1,000	$ 1,000
Class A Common Stock [Member]
Common Stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	72,236,519	73,211,519
Common stock, shares outstanding	72,236,519	73,211,519
Class B Common Stock [Member]
Common Stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	11,346,336	11,346,336
Common stock, shares outstanding	11,346,336	11,346,336
Variable Interest Entity, Primary Beneficiary [Member]
Restricted cash	$ 22,811	$ 25,358
Notes receivable, net	306,341	280,841
Junior Subordinated Debentures [Member]
Debt issuance cost	1,777	1,822
Non-Recourse Receivable Backed Notes Payable [Member]
Debt issuance cost	6,017	4,905
Notes And Mortgage Notes Payable And Lines Of Credit [Member]
Debt issuance cost	$ 1,884	$ 2,011