Percentage Of Target Award Opportunities Maximum In Certain Cases

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- Definition

Performance Based Stock Awards Vesting Period

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- Definition

Performance Shares Awards As Percentage Of Target

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Target Award Participants Earn

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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

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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- Definition

Date the equity-based award expires, in YYYY-MM-DD format.

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- Definition

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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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Number of shares issued under share-based payment arrangement.

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Incentive Compensation Plan - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions																								12 Months Ended
	Dec. 13, 2021	Dec. 09, 2021	Nov. 22, 2021	Nov. 19, 2021	Sep. 27, 2021	Jun. 14, 2021	Feb. 18, 2021	Feb. 20, 2020	Feb. 21, 2019	Nov. 26, 2018	May 29, 2018	Mar. 26, 2018	Feb. 28, 2018	Feb. 26, 2018	Mar. 24, 2017	Feb. 23, 2017	Dec. 19, 2016	Sep. 30, 2016	Sep. 19, 2016	Jun. 07, 2016	Mar. 01, 2016	Mar. 01, 2016	Dec. 30, 2015	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								$ 13.64	$ 13.72	$ 14.22
Maximum number of shares that are available to be awarded																								5,000,000
Vesting period of restricted stock							0 years	0 years	0 years				0 years			0 years							0 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																								2,434,596
Performance Based Stock Awards Vesting Period							3 years	3 years	3 years				3 years			3 years							5 years
Share Based Compensation Arrangement By Share Based Payment Award Percentage Of Target Award Participants Earn							40.00%	40.00%	40.00%				40.00%			40.00%
Performance Shares Awards As Percentage Of Target							100.00%	100.00%	100.00%				100.00%			100.00%
Percentage Of Target Award Opportunities Maximum In Certain Cases							200.00%	200.00%	200.00%				200.00%			200.00%
Executive Officer [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)	2,000	1,000	1,565	24,000	6,000	15,000	84,950	95,300	63,000
Grant Price (in dollars per share)	$ 14.83	$ 15.07	$ 15.96	$ 15.81	$ 13.78	$ 14.58	$ 12.77	$ 13.72	$ 14.22
Vesting Date	Dec. 13, 2024	Dec. 09, 2024	Nov. 22, 2024	Nov. 19, 2024	Sep. 27, 2024	Jun. 01, 2024	Feb. 18, 2024	Feb. 20, 2023	Feb. 22, 2022
Vesting period of restricted stock	1 year	1 year	1 year	1 year	1 year	3 years	1 year	1 year	1 year
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)									15,000	2,000	3,000	2,000		77,500			15,000	10,000	33,000	10,000	5,000	10,000
Grant Price (in dollars per share)									$ 14.22	$ 13.82	$ 15.44	$ 14.08		$ 14.49			$ 13.96	$ 10.09	$ 10.02	$ 9.34	$ 8.84	$ 8.84
Vesting Date									Feb. 22, 2022	Nov. 26, 2021	May 29, 2021	Mar. 26, 2021		Feb. 26, 2021			Dec. 19, 2019	Sep. 30, 2019	Sep. 19, 2019	Jun. 07, 2019	Mar. 01, 2019	Mar. 01, 2019
Share-based Payment Arrangement, Expense																								$ 3.1	$ 2.9	$ 2.7
Unrecognized compensation cost related to unvested restricted stock																								$ 3.8
Vesting period of restricted stock									1 year	1 year	1 year	1 year		1 year			3 years	1 year	3 years	1 year	1 year	1 year
March 24, 2017 Grant 3 [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)															7,000
Grant Price (in dollars per share)															$ 12.99
Vesting Date															Mar. 24, 2020
Vesting period of restricted stock															1 year
March 24, 2017 Grant 1 [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued (in shares)															5,000
Grant Price (in dollars per share)															$ 12.99
Vesting Date															Mar. 24, 2020
Vesting period of restricted stock															1 year
February 23, 2017 \| Time [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								$ 13.29
February 23, 2017 \| Component 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								15.09
February 23, 2017 \| Component 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								13.29
February 22, 2018 \| Time [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								14.17
February 22, 2018 \| Component 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								15.83
February 22, 2018 \| Component 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								13.25
February 21, 2019 \| Time [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								14.22
February 21, 2019 \| Component 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								13.07
February 21, 2019 \| Component 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								16.62
February 20, 2020 \| Time [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								13.72
February 20, 2020 \| Component 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								12.43
February 20, 2020 \| Component 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								15.37
February 18, 2021 \| Time [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								12.77
February 18, 2021 \| Component 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								16.41
February 18, 2021 \| Component 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Price (in dollars per share)																								$ 11.45