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Equity Transactions and Stock Incentive Plans - Summary of PSU Activity (Details) - Performance Stock Units (PSUs) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restricted Stock Units Outstanding
Units Outstanding, Beginning of year (in shares)	376,328	376,328	171,748	62,791
Units Outstanding, Granted (in shares)		404,880	204,580	108,957
Units Outstanding, Vested (in shares)	(5,254)	(5,254)	0	0
Units Outstanding, Cancelled (in shares)	(32,235)	(32,235)	0	0
Units Outstanding, End of year (in shares)		743,719	376,328	171,748
Weighted Average Grant Date Fair Value
Weighted Average Grant Date Fair Value, Beginning of year (USD per share)	$ 20.65	$ 20.65	$ 28.41	$ 27.87
Weighted Average Grant Date Fair Value, Granted (USD per share)		8.86	14.13	28.72
Weighted Average Grant Date Fair Value, Vested (USD per share)		28.72
Weighted Average Grant Date Fair Value, Cancelled (USD per share)		28.72
Weighted Average Grant Date Fair Value, End of year (USD per share)		$ 13.82	$ 20.65	$ 28.41
Total Fair Value of Shares Vested		$ 47	$ 0	$ 0
Percentage of target number of PSU's eligible to vest at "maximum" performance level		200.00%
2018
Weighted Average Grant Date Fair Value
Actual number of PSUs granted to each recipient, eligible to vest	76,722		108,957

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The weighted average fair value at grant date for nonvested equity-based awards issued 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 number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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