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Mortgage Loans Held for Investment, Net and Related Financing Mortgage Loans Held for Investment, Net (Notes) | 12 Months Ended
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Dec. 31, 2014
Mortgage Loans Held for Investment, Net [Abstract] |
Mortgage Loans Held for Investment, Net [Text Block] | The Company's mortgage loans held for investment, net consist of securitized and unsecuritized mortgage loans originated or purchased by the Company from 1992 through 1998. The following table provides detail by type of collateral as of the periods indicated:
| December 31, 2014 |  | December 31, 2013
Single-family mortgage loans held for investment, amortized cost | $ | 30,214 |  |  | $ | 35,328 |
Commercial mortgage loans held for investment, amortized cost | 9,736 |  |  | 20,352 |
Allowance for loan losses | (250 | ) |  | (257 | )
Total mortgage loans held for investment, net | $ | 39,700 |  |  | $ | 55,423 |
Commercial securitized mortgage loans are evaluated individually for impairment when the debt service coverage ratio on the mortgage loan is less than 1:1 or when the mortgage loan is delinquent. Commercial mortgage loans not evaluated for individual impairment are evaluated for a general allowance. There were no securitized commercial mortgage loans identified as seriously delinquent (60 or more days past due) on the Company's consolidated balance sheets as of December 31, 2014 or as of December 31, 2013. Single-family mortgage loans are considered homogeneous and are evaluated on a pool basis for a general allowance. The unpaid principal balance of the Company's securitized single-family mortgage loans identified as seriously delinquent as of December 31, 2014 was $2,221 compared to $2,758 as of December 31, 2013. The Company continues to accrue interest on its seriously delinquent securitized single-family mortgage loans because the primary servicer continues to advance the interest and/or principal due on the loan. The Company considers various factors in determining its specific and general allowance requirements, including whether a loan is delinquent, the Company’s historical experience with similar types of loans, historical cure rates of delinquent loans, and historical and anticipated loss severity of the mortgage loans as they are liquidated. The factors may differ by mortgage loan type (e.g., single-family versus commercial) and collateral type (e.g., multifamily versus office property). The allowance for loan losses is evaluated and adjusted periodically by management based on the actual and estimated timing and amount of probable credit losses, using the above factors, as well as industry loss experience. The majority of the Company's mortgage loans held for investment, net are securitized mortgage loans, of which $11,902 of principal is pledged as collateral for an outstanding class of the Company's single-family securitization financing bond, which is recorded on the Company's balance sheet as "non-recourse collateralized financing". The interest rate on this bond is based on 1-month LIBOR plus 0.30% and has an estimated life remaining of less than 3 years as of December 31, 2014. The principal balance outstanding as of December 31, 2014 is $10,967 compared to $13,134 as of December 31, 2013.
Allowance for Credit Losses [Text Block] | Commercial securitized mortgage loans are evaluated individually for impairment when the debt service coverage ratio on the mortgage loan is less than 1:1 or when the mortgage loan is delinquent. Commercial mortgage loans not evaluated for individual impairment are evaluated for a general allowance. There were no securitized commercial mortgage loans identified as seriously delinquent (60 or more days past due) on the Company's consolidated balance sheets as of December 31, 2014 or as of December 31, 2013. Single-family mortgage loans are considered homogeneous and are evaluated on a pool basis for a general allowance. The unpaid principal balance of the Company's securitized single-family mortgage loans identified as seriously delinquent as of December 31, 2014 was $2,221 compared to $2,758 as of December 31, 2013. The Company continues to accrue interest on its seriously delinquent securitized single-family mortgage loans because the primary servicer continues to advance the interest and/or principal due on the loan. The Company considers various factors in determining its specific and general allowance requirements, including whether a loan is delinquent, the Company’s historical experience with similar types of loans, historical cure rates of delinquent loans, and historical and anticipated loss severity of the mortgage loans as they are liquidated. The factors may differ by mortgage loan type (e.g., single-family versus commercial) and collateral type (e.g., multifamily versus office property). The allowance for loan losses is evaluated and adjusted periodically by management based on the actual and estimated timing and amount of probable credit losses, using the above factors, as well as industry loss experience.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5066-111524 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Article 4 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5162-111524 + Details
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