Amount by which current fair value of underlying stock exceeds exercise price of exercised options.

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

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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 cost to be recognized for option under share-based payment arrangement.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Amount of cash inflow 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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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Share-Based Payment Plans - Additional disclosures (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash received from option exercises							$ 178	$ 21
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options issued		0		0	0	0	0
Stock options expense	$ 112		$ 117				$ 347	380
Unrecognized compensation cost related to non-vested options	788,000						$ 788,000
Recognition period of nonvested stock options							1 year 10 months 13 days
Intrinsic value of outstanding options	13,200						$ 13,200
Intrinsic value of exercisable options	12,200						12,200
Intrinsic value of options exercised	86		403				166	1,275
Cash received from option exercises	7						178	21
Excess tax benefit from option exercises	15		78				15	244
Restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options expense	574		$ 365				1,500	$ 1,100
Unrecognized compensation cost related to non-vested options	$ 6,700						$ 6,700
Recognition period of nonvested stock options							4 years 5 months 23 days