| Residential Mortgage Loans Held-for-Sale, at Fair Value (Notes) | 3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mar. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||
| Residential Mortgage Loans Held-for-Sale [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Residential Mortgage Loans Held-for-Sale [Text Block] | Residential Mortgage Loans Held-for-Sale, at Fair Value 
Residential mortgage loans held-for-sale consists of residential mortgage loans carried at fair value as a result of a fair value option election. The following table presents the carrying value of the Company’s residential mortgage loans held-for-sale as of March 31, 2016 and December 31, 2015:
 
 
At March 31, 2016 and December 31, 2015, the Company pledged residential mortgage loans with a carrying value of $323.2 million and $745.5 million, respectively, as collateral for repurchase agreements and FHLB advances. See Note 15 - Repurchase Agreements and Note 17 - Federal Home Loan Bank of Des Moines Advances.
 | ||||||||||||||||||||||||||||||||||||||||||||||||
| X | ||||||||||
| 
- Definition Residential Mortgage Loans Held-for-Sale [Abstract] No definition available. 
 | 
| X | ||||||||||
| 
- Definition Disclosure of the carrying amount of residential mortgage loans to individuals not classified as held for investment but are held-for-sale. No definition available. 
 |