Fair Value of Financial Instruments (Details 5) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Real Estate Investments, Fair Value	$ 56,571
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	69,466
Lending Investments Held For Sale Impairment Of Fair Value	196,548
Office [Member]
Real Estate Investments, Fair Value	3,593
Branch [Member]
Real Estate Investments, Fair Value	4,749
Industrial [Member]
Real Estate Investments, Fair Value	0
Hotel [Member]
Real Estate Investments, Fair Value	24,034
Land [Member]
Real Estate Investments, Fair Value	24,195
Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	60,335
Lending Investments Held For Sale Impairment Of Fair Value	174,477
Subordinate Interest In Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	9,131
Lending Investments Held For Sale Impairment Of Fair Value	1,649
Mezzanine Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	20,422
Preferred Equity [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 1 [Member]
Real Estate Investments, Fair Value	0
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Office [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Branch [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Industrial [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Hotel [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Land [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Subordinate Interest In Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Mezzanine Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 1 [Member] | Preferred Equity [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 2 [Member]
Real Estate Investments, Fair Value	0
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Office [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Branch [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Industrial [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Hotel [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Land [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Subordinate Interest In Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Mezzanine Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 2 [Member] | Preferred Equity [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	0
Fair Value, Inputs, Level 3 [Member]
Real Estate Investments, Fair Value	56,571
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	69,466
Lending Investments Held For Sale Impairment Of Fair Value	196,548
Fair Value, Inputs, Level 3 [Member] | Office [Member]
Real Estate Investments, Fair Value	3,593
Fair Value, Inputs, Level 3 [Member] | Branch [Member]
Real Estate Investments, Fair Value	4,749
Fair Value, Inputs, Level 3 [Member] | Industrial [Member]
Real Estate Investments, Fair Value	0
Fair Value, Inputs, Level 3 [Member] | Hotel [Member]
Real Estate Investments, Fair Value	24,034
Fair Value, Inputs, Level 3 [Member] | Land [Member]
Real Estate Investments, Fair Value	24,195
Fair Value, Inputs, Level 3 [Member] | Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	60,335
Lending Investments Held For Sale Impairment Of Fair Value	174,477
Fair Value, Inputs, Level 3 [Member] | Subordinate Interest In Whole Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	9,131
Lending Investments Held For Sale Impairment Of Fair Value	1,649
Fair Value, Inputs, Level 3 [Member] | Mezzanine Loans [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	20,422
Fair Value, Inputs, Level 3 [Member] | Preferred Equity [Member]
Lending Investments Held For Sale Allowance For Loan Loss Fair Value	0
Lending Investments Held For Sale Impairment Of Fair Value	$ 0