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Stock Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Options Activity

A summary of the status of the Company’s stock options at December 31, 2019, together with changes during the periods then ended, is presented below:

										Weighted
						Weighted				Average				Aggregate
						Average				Remaining				Intrinsic
		Number				Exercise				Contractual				Value
		of Options				Price				Term (Years)				(In Thousands)
Outstanding at December 31, 2018			372,260			$	39.08				—				—
Options exercised			(54,420	)			13.87				—				—
Outstanding at December 31, 2019			317,840				43.40				4.49				14,958
Exercisable at December 31, 2019			195,340				19.60				2.16			$	13,841

Summary of Fair Value of Stock Option Awards Under Black-Scholes Option-Pricing Model

The fair value of stock option awards as determined under the Black-Scholes option-pricing model was estimated with the following weighted-average assumptions:

		2018
Expected volatility			42.2	%
Risk free interest rate			2.7	%
Expected dividend yield			1.2	%
Expected term			8.3 years
Weighted average fair value per share		$	36.41

Schedule of Restricted Stock Unit Activity

The following table presents restricted stock unit activity:

						Weighted Average
						Grant Date
		Units				Fair Value
Nonvested at December 31, 2018			203,854			$	60.93
Granted			72,803				79.55
Vested			(98,829	)			56.49
Cancelled/Forfeited			(4,355	)			70.12
Nonvested at December 31, 2019			173,473			$	71.49

Schedule of Performance Share Unit Activity

The following table presents PSU activity:

						Weighted Average
						Grant Date
		Units				Fair Value
Nonvested at December 31, 2018			33,325			$	66.34
Granted			11,488				72.02
Vested			(3,969	)			74.60
Cancelled/Forfeited			(5,018	)			64.76
Nonvested at December 31, 2019			35,826			$	67.47

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Tabular disclosure of number and weighted-average grant date fair value for nonvested performance shares.

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