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

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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Gross number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock Compensation (Details) - USD ($)	12 Months Ended
Stock Compensation (Details) - USD ($)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost not yet recognized	$ 1,229,000
Granted (in shares)		406,875	427,219
Exercise price of options (in dollars per share)		$ 10.92	$ 18.42
Option exercises in period, intrinsic value	835,000	$ 6,577,000
Tax benefit of options exercised	104,000	1,546,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,428,000	1,923,000	$ 2,246,000
Contractual term	10 years
Total compensation cost not yet recognized, period for recognition	1 year 1 month 13 days
Stock Options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	2 years
Stock Options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	7 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense		$ 21,000	$ 85,000
Total compensation cost not yet recognized, period for recognition	1 year 3 months 3 days
2014 Management Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for issuance	7,251,038