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Stock Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018, 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, 2017			292,400			$	17.99				—				—
Options granted at market price			120,000				82.21				—				—
Options exercised			(40,140	)			14.39				—				—
Outstanding at December 31, 2018			372,260				39.08				4.86				9,759
Exercisable at December 31, 2018			219,135				17.73				2.56			$	8,661

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			2016
Expected volatility			42.2	%		55.2			%
Risk free interest rate			2.7	%		1.2			%
Expected dividend yield			1.2	%		2.2			%
Expected term			8.3 years			6.2 years
Weighted average fair value per share		$	36.41		$		17.10

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, 2017			234,383			$	47.26
Granted			55,352				96.31
Vested			(53,938	)			46.56
Cancelled/Forfeited			(31,943	)			46.20
Nonvested at December 31, 2018			203,854			$	60.93

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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.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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-Name Accounting Standards Codification
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