Stock Compensation - Restricted Stock and Performance Share Grants - Assumptions (Details) - Performance share grants $ / shares in Units, $ in Thousands	9 Months Ended
Sep. 30, 2020 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	1.69%
Shares granted (in shares) \| shares	777,970
December 12, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price at target achievement (in dollars per share)	$ 18.80
Expected volatility	17.28%
Simulated Monte Carlo share price (in dollars per share)	$ 11.95
Shares granted (in shares) \| shares	6,327
Total fair value of award \| $	$ 76
March 11, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price at target achievement (in dollars per share)	$ 16.36
Expected volatility	18.21%
Risk-free interest rate	0.58%
Simulated Monte Carlo share price (in dollars per share)	$ 5.87
Shares granted (in shares) \| shares	81,716
Total fair value of award \| $	$ 480

Share-based Compensation Arrangement by Share-based Payment Award, Price at Target Achievement

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Share-based Compensation Arrangement by Share-based Payment Award, Simulated Price

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

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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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