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Valuation Fair Value, Other Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	$ 59,671	$ 35,351	$ 44,263	$ 18,585
Due from brokers	49,966	34,596
Reverse repurchase agreements	2,218	2,084
Repurchase agreements	1,109,342	1,296,272
Due to brokers	2,348	33
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents	59,671	35,351
Due from brokers	49,966	34,596
Reverse repurchase agreements	2,218	2,084
Repurchase agreements	1,109,342	1,296,272
Due to brokers	2,348	33
Reported Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	59,671	35,351
Due from brokers	49,966	34,596
Reverse repurchase agreements	2,218	2,084
Repurchase agreements	1,109,342	1,296,272
Due to brokers	$ 2,348	$ 33

X

- Definition

The amount of cash held with a broker or counterparty as collateral/margin for investment or derivative security positions. In addition this amount can also include amounts owed to the Company for opened or closed derivative positions.

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The amount of cash owed to a broker or counterparty which was received by the Company as collateral/margin for investment or derivative security positions. In addition this amount can also include amounts owed to the broker or counterparty for opened or closed derivative positions.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount, after the effects of master netting arrangements, of funds outstanding loaned in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes purchases of participations in pools of securities that are subject to a resale agreement, assets not subject to a master netting arrangement and not elected to be offset.

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