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Mortgage-Backed Securities Interest Income Components (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Interest Income Components [Line Items] |  |
Net Amortization | $ (3,501) | $ (3,065)
Interest income | 9,881 | 12,613
Agency RMBS [Member] |  |
Interest Income Components [Line Items] |  |
Coupon Interest | 14,179 | 16,269
Net Amortization | (4,843) | (4,146)
Interest income | 9,336 | 12,123
Non-Agency RMBS [Member] |  |
Interest Income Components [Line Items] |  |
Coupon Interest | 89 | 112
Net Amortization | 107 | 132
Interest income | 196 | 244
Residential Mortgage Backed Securities [Member] |  |
Interest Income Components [Line Items] |  |
Coupon Interest | 14,268 | 16,381
Net Amortization | (4,736) | (4,014)
Interest income | $ 9,532 | $ 12,367

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- Definition [Line Items] for Interest Income Components [Table] + References No definition available. + Details
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- Definition The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(b)) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
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