Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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Price of a single share of a number of saleable stocks of a company.

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Employment and Compensation Arrangements - 2019 Transaction Related Awards (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Aug. 14, 2019	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 17,469	$ 3,176
Transaction Related Awards 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuable shares (in shares)		7,000,000
Share price (usd per share)		$ 20.00
Weighted-average risk-free interest rate	1.33%
Expected volatility rate	20.00%
Weighted-average expected dividend yield	0.00%
Share-based compensation expense		$ 13,720