Equity-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Equity-Based Compensation Expense

The following table summarizes the compensation expense included in selling, general and administrative expenses in the Condensed Consolidated Statements of Earnings related to stock-based compensation plans:

	Three Months Ended
	March 31,			March 31,
	2018			2017
Service-Based RSUs	$	455		$	550
Performance-Based RSUs	510			384
Cash-settled RSUs	(42		)	(54		)
Total	$	923		$	880
Income tax benefit	209			331
Net	$	714		$	549

Schedule of Unrecognized Equity-Based Compensation Expense

The following table summarizes the unrecognized compensation expense related to non-vested RSUs by type and the weighted-average period in which the expense is to be recognized:

	Unrecognized
	Compensation		Weighted-
	Expense at		Average
	March 31, 2018		Period
Service-Based RSUs	$	2,496	1.93
Performance-Based RSUs	3,874		1.89
Total	$	6,370	1.91

Summary of Status of Equity-Based Compensation Plans

The following table summarizes the status of these plans as of March 31, 2018:

	2014 Plan	2009 Plan	2004 Plan	Directors' Plan
Awards originally available	1,500,000	3,400,000	6,500,000	N/A
Performance-based options outstanding	295,000	—	—	—
Maximum potential RSU and cash settled awards outstanding	745,978	122,600	57,391	9,620
Maximum potential awards outstanding	1,040,978	122,600	57,391	9,620
RSUs and cash settled awards vested and released	315,792	—	—	—
Awards available for grant	143,230	—	—	—

Summary of Service-Based Restricted Stock Units

summarizes the service-based RSU activity as of and for the three months ended March 31, 2018: 

	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	399,347		$	14.60
Granted	71,722		26.20
Vested and released	(60,797	)	16.43
Forfeited	(515	)	14.83
Outstanding at March 31, 2018	409,757		$	16.36
Releasable at March 31, 2018	260,478		$	12.48

Schedule of Components of Performance-Based RSU's

The following table summarizes the performance and market-based RSU activity as of and for the three months ended March 31, 2018:

	Units		Weighted Average Grant Date Fair Value
Outstanding at January 1, 2018	271,305		$	18.77
Granted	72,043		28.75
Attained by performance	18,600		17.66
Released	(72,456	)	18.66
Forfeited	(21,700	)	17.66
Outstanding at March 31, 2018	267,792		$	21.44
Releasable at March 31, 2018	—		$	—

The following table summarizes each grant of performance awards outstanding at March 31, 2018.

Description	Grant Date	Vesting Year	Vesting Dependency	Target Units Outstanding	Maximum Number of Units to be Granted
2016 - 2018 Performance RSUs	February 16, 2016	2018	35% RTSR, 35% sales growth, 30% cash flow	92,840	185,680
2017 - 2019 Performance RSUs	February 9, 2017	2019	35% RTSR, 35% sales growth, 30% cash flow	71,796	143,592
2017 - 2019 Performance RSUs	February 9, 2017	2018 - 2020	Operating Income	27,113	27,113
2018 - 2020 Performance RSUs	February 8, 2018	2020	35% RTSR, 35% sales growth, 30% cash flow	40,223	80,446
2018 - 2020 Performance RSUs	February 16, 2018	2020	35% RTSR, 35% sales growth, 30% cash flow	31,820	63,640
Single Crystal Performance RSUs	March 31, 2016	2018	Various	4,000	8,000