Retained Interests In Securitizations (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Retained Interestes Securitzations [Line Items]
Retained interests in securitizations	$ 3,336,009	$ 3,495,471
[Hmac20041Member]
Retained Interestes Securitzations [Line Items]
Issue Date	March 4, 2004
Retained interests in securitizations	74,000	218,000
[Hmac20042Member]
Retained Interestes Securitzations [Line Items]
Issue Date	May 10, 2004
Retained interests in securitizations	890,000	878,000
[Hmac20043Member]
Retained Interestes Securitzations [Line Items]
Issue Date	June 30, 2004
Retained interests in securitizations	750,000	865,000
[Hmac20044Member]
Retained Interestes Securitzations [Line Items]
Issue Date	August 16, 2004
Retained interests in securitizations	881,000	532,000
[Hmac20045Member]
Retained Interestes Securitzations [Line Items]
Issue Date	September 28, 2004
Retained interests in securitizations	$ 741,000	$ 1,002,000