Investments Equity Method Investments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entity, Qualitative or Quantitative Information, Date Involvement Began	Sep. 25, 2017
Variable Interest Entity, Financial or Other Support, Amount	$ 200,000
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage	76.60%
Variable Interest Entity, Measure of Activity, Other, Amount	$ 22,800	$ 9,800
Variable Interest Entity, Measure of Activity, Purchases	22,800	9,800
Loss on equity method investments	(4,269)	(474)
Management Fee Expense	800	$ 800
Equity Method Investments	67,491		$ 50,274
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	67,491		$ 50,274
Equity Method Investment, Other than Temporary Impairment	$ 7,000

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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Amount of expenses related to the managing member or general partner for management of the day-to-day business functions of the limited liability company (LLC) or limited partnership (LP).

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The amount of activity, consisting of a transaction or a measure not described elsewhere in the taxonomy, occurring during the period between the reporting entity and the Variable Interest Entity (VIE) or potential VIE.

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The amount of purchases between the reporting entity and the Variable Interest Entity (VIE).

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Date the relationship between reporting entity and the Variable Interest Entity (VIE) began, in CCYY-MM-DD format.

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