XML 40 R14.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Offsetting of Assets and Liabilities (Notes) | 9 Months Ended
--- | ---
Sep. 30, 2013
Offsetting of Assets and Liabilities [Abstract] |
OffsettingOfAssetsAndLiabilities [Text Block] | Offsetting of Assets and Liabilities The Company records financial instruments at fair value as described in Note 4. All financial instruments are recorded on a gross basis on the Consolidated Balance Sheet. In connection with its financial derivatives, repurchase agreements, and related trading agreements, the Company and its counterparties are required to pledge collateral. Cash or other collateral is exchanged as required with each of the Company's counterparties in connection with open derivative positions and repurchase agreements. The following table presents information about certain assets and liabilities representing financial instruments as of September 30, 2013. The Company has not previously entered into master netting agreements with any of its counterparties.
Description |  | Amount of Assets (Liabilities) Presented in the Consolidated Balance Sheet(1) |  | Financial Instruments(2)(3) |  | Cash Collateral (Received) Pledged(3) |  | Net Amount
(In thousands) |  |  |  |  |  |  |  |
Assets: |  |  |  |  |  |  |  |
Financial derivatives-assets at fair value- Gross |  | $ | 23,181 |  |  |  |  |  |  |
Financial derivatives-assets at fair value-Net |  | $ | 16,114 |  |  | $ | — |  |  | $ | (3,311 | ) |  | $ | 12,803 |
Liabilities: |  |  |  |  |  |  |  |
Financial derivatives-liabilities at fair value- Gross |  | $ | (7,067 | ) |  |  |  |  |  |
Financial derivatives-liabilities at fair value-Net |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Repurchase Agreements |  | $ | (1,292,946 | ) |  |  |  |  |  |
Repurchase Agreements-Net |  | $ | (1,292,946 | ) |  | $ | 1,296,756 |  |  | $ | (3,810 | ) |  | $ | — |
(1) | On the Company's Consolidated Balance Sheet, all balances associated with the repurchase agreements and financial derivatives are presented on a gross basis.
(2) | Amounts disclosed in the Financial Instruments column of the table represent collateral that is available to be offset against balances associated with repurchase agreements.
(3) | As collateral is called or posted per counterparty it is generally called or posted across all positions with each respective counterparty.

X
- Details
Name: | earn_OffsettingofAssetsandLiabilitiesAbstract
Namespace Prefix: | earn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for derivatives and repurchase agreements agreements that are subject to offsetting. + References No definition available. + Details
Name: | earn_OffsettingOfAssetsAndLiabilitiesTextBlock
Namespace Prefix: | earn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration