Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2020

Stock Options [Member]

Details Of Weighted-Average Grant-Date Fair Values And Assumptions Used For Estimating Fair Values

	2020			2019			2018
Weighted-average grant-date fair value	$	5.28		$	6.47		$	8.91
Expected life, in years		5.2			5.6			5.4
Risk-free interest rate		1.4	%		2.5	%		2.7	%
Expected volatility		35.1	%		33.9	%		39.7	%
Expected dividend yield		—	%		—	%		—	%

Summary of Stock-Based Compensation Activity

					Weighted-
					Average
			Weighted-		Remaining		Aggregate
	Number of		Average		Contractual		Intrinsic
	Options		Exercise Price		Term		Value
Outstanding at December 31, 2019		1,728,999	$	12.49
Granted		345,100		14.64
Exercised		(115,033)		6.57
Forfeited or expired		(25,167)		14.65
Outstanding at December 31, 2020		1,933,899	$	13.20		5.4	$	4,959
Exercisable at December 31, 2020		1,381,365	$	11.96		4.1	$	4,916
Vested or expected to vest at December 31, 2020		1,933,899	$	13.20		5.4	$	4,959

Information Related to Stock Options Exercised

(Dollars in thousands)	2020		2019		2018
Proceeds from the exercise of stock options	$	756	$	1,052	$	727
Intrinsic value of stock options exercised		867		750		1,590
Income tax benefit related to stock options exercised		182		158		334

Summary of Stock-Based Compensation Expense

(Dollars in thousands)	2020		2019		2018
Compensation expense recorded in Selling, general and administrative expenses	$	2,304	$	1,801	$	1,528
Deferred income tax benefits related to compensation expense		484		378		321
Total fair value of stock options vested		465		1,387		1,390
Unrecognized compensation cost		2,039		1,469		606
Expected weighted-average recognition period for unrecognized compensation, in years		1.8		2.2		2.7

Performance Share Units [Member]

Summary of Stock-Based Compensation Activity

			Weighted-
			Average
			Remaining
	Number of		Contractual
	Units		Term
Outstanding at December 31, 2019		452,000
Granted		284,894
Earned		(243,394)
Forfeited or expired		(11,502)
Outstanding at December 31, 2020		481,998		1.2
Vested or expected to vest at December 31, 2020		481,998		1.2

Summary of Stock-Based Compensation Expense

(Dollars in thousands)	2020		2019		2018
Compensation expense recorded in Selling, general and administrative expenses	$	3,270	$	3,607	$	4,152
Deferred income tax benefits related to compensation expense		773		757		872
Unrecognized compensation cost		3,417		2,730		3,599
Expected weighted-average recognition period for unrecognized compensation, in years		1.5		1.6		1.4