XML 19 R38.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Derivative Instruments Schedule of Gains and Losses on Derivative Instruments (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2013
Derivative [Line Items] |  |  |
Net realized gains losses on periodic settements of interest rate swaps |  | $ 49 | $ (20)
Net realized gains losses other than on periodic settements of interest rate swaps |  | 4,224 | 12,670
Net realized gains on financial derivatives | 0 | 4,273 | 12,650
Unrealized gain loss on accrued periodic settlements on interest rate swaps |  | (3,109) | (4,151)
Unrealized gain loss on other than accured periodic settlements on interest rate swaps |  | (9,063) | 20,265
Change in net unrealized gains (losses) on financial derivatives | 0 | (12,172) | 16,114
Interest Rate Swap [Member] |  |  |
Derivative [Line Items] |  |  |
Net realized gains losses on periodic settements of interest rate swaps |  | 49 | (20)
Net realized gains losses other than on periodic settements of interest rate swaps |  | 2,451 | 2,631
Net realized gains on financial derivatives |  | 2,500 | 2,611
Unrealized gain loss on accrued periodic settlements on interest rate swaps |  | (3,109) | (4,151)
Unrealized gain loss on other than accured periodic settlements on interest rate swaps |  | (1,420) | 25,819
Change in net unrealized gains (losses) on financial derivatives |  | (4,529) | 21,668
Interest Rate Swaption [Member] |  |  |
Derivative [Line Items] |  |  |
Net realized gains losses other than on periodic settements of interest rate swaps |  | 0 | 0
Net realized gains on financial derivatives |  | 0 | 0
Unrealized gain loss on other than accured periodic settlements on interest rate swaps |  | (86) | (86)
Change in net unrealized gains (losses) on financial derivatives |  | (86) | (86)
TBA securities [Member] |  |  |
Derivative [Line Items] |  |  |
Net realized gains losses other than on periodic settements of interest rate swaps |  | 1,773 | 10,039
Net realized gains on financial derivatives |  | 1,773 | 10,039
Unrealized gain loss on other than accured periodic settlements on interest rate swaps |  | (7,557) | (5,468)
Change in net unrealized gains (losses) on financial derivatives |  | $ (7,557) | $ (5,468)

X
- Definition Net realized gains (losses) on periodic settements of interest rate swaps. + References No definition available. + Details
Name: | earn_Netrealizedgainslossesonperiodicsettementsofinterestrateswaps
Namespace Prefix: | earn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net realized gains (losses) other than on periodic settements of interest rate swaps. + References No definition available. + Details
Name: | earn_Netrealizedgainslossesotherthanonperiodicsettementsofinterestrateswaps
Namespace Prefix: | earn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Realized gains or (losses) on derivatives sold, terminated, or otherwise disposed of during the period. In addition, periodic payments or receipts on swaps are recorded as realized gains or losses. + References No definition available. + Details
Name: | earn_Netrealizedgainsonderivativeinstruments
Namespace Prefix: | earn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrealized gains (losses) on accrued periodic settlements on interest rate swaps. + References No definition available. + Details
Name: | earn_Unrealizedgainlossonaccruedperiodicsettlementsoninterestrateswaps
Namespace Prefix: | earn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Unrealized gains (losses) on other than accrued periodic settlements on interest rate swaps. + References No definition available. + Details
Name: | earn_Unrealizedgainlossonotherthanaccuredperiodicsettlementsoninterestrateswaps
Namespace Prefix: | earn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration