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Share-Based Compensation - Summary of Stock Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation (benefit) - stock options	$ (106)	$ 458	$ 1,294
Income tax benefit (expense)	(29)	127	521
Unrecognized compensation expense	$ 7	$ 146	$ 729
Weighted-average amortization period remaining	3 months 18 days	1 year 1 month 6 days	1 year 2 months 12 days
Restricted Shares
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total share-based compensation - restricted stock	$ 1,965	$ 958	$ 203
Income tax benefit	547	267	83
Unrecognized compensation expense	$ 4,616	$ 3,167	$ 1,227
Weighted-average amortization period remaining	2 years 7 months 6 days	2 years 10 months 24 days	2 years 9 months 18 days

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Allocated share based compensation expense (benefit).

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Employee service share based compensation tax benefit expense from compensation expense.

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- Definition

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

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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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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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