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EMPLOYEE STOCK COMPENSATION - Nonvested Restricted Stock Awards and Restricted Stock Units (Detail)	3 Months Ended
	Mar. 31, 2021 $ / shares shares
Restricted stock awards and restricted stock units
Number of Shares
Outstanding at beginning of period (in shares)	848,302
Granted (in shares)	220,457
Vested (in shares)	(152,248)
Forfeited (in shares)	(50,532)
Outstanding at end of period (in shares)	865,979
Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 14.42
Granted (in dollars per share) | $ / shares	20.63
Vested (in dollars per share) | $ / shares	14.82
Forfeited (in dollars per share) | $ / shares	11.17
Outstanding at end of period (in dollars per share) | $ / shares	$ 16.12
Performance shares
Number of Shares
Granted (in shares)	58,839
Vested (in shares)	(69,109)
Forfeited (in shares)	(40,160)

X

- Definition

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 number of grants made 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 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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