Preferred and Common Shares and Share-Based Compensation (Tables)

9 Months Ended

Oct. 01, 2021

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Share-Based Compensation Expense Recorded in the Consolidated Statements of Operations

The table below summarizes share-based compensation expense recorded in the consolidated statements of operations (in thousands):

	Three Months Ended				Nine Months Ended
	October 1,		October 2,		October 1,		October 2,
	2021		2020		2021		2020
Selling, general and administrative	$	4,360	$	4,265	$	13,123	$	10,225
Research and development and engineering		534		1,150		1,776		2,204
Cost of revenue		631		1,589		2,305		3,185
Restructuring, acquisition, and related costs		2,965		221		2,965		458
Total share-based compensation expense	$	8,490	$	7,225	$	20,169	$	16,072

Schedule of Share Based Payment Award Performance Stock Awards Valuation Assumptions

The fair value of the TSR-PSUs at the date of grant was estimated using the Monte Carlo valuation method with the following assumptions:

	Nine Months Ended October 1, 2021
Grant-date stock price	$	138.23
Expected volatility		42.44	%
Risk-free interest rate		0.22	%
Expected annual dividend yield		—
Fair value	$	166.64

Amended and Restated 2010 Incentive Plan

Share Based Compensation Arrangement By Share Based Payment Award [Line Items]

Restricted Stock Units and Deferred Stock Units Issued and Outstanding

The table below summarizes activities relating to RSUs and DSUs issued and outstanding under the Company’s Amended and Restated 2010 Incentive Plan during the nine months ended October 1, 2021:

	Shares (In thousands)			Weighted Average Grant Date Fair Value
Unvested at December 31, 2020		625		$	58.79
Granted		169		$	136.85
Vested		(485	)	$	51.21
Forfeited		(20	)	$	103.20
Unvested at October 1, 2021		289		$	113.94
Expected to vest as of October 1, 2021		272

Performance-Based Awards Issued and Outstanding

The table below summarizes the activities relating to the performance-based awards issued and outstanding under the Company’s Amended and Restated 2010 Incentive Plan during the nine months ended October 1, 2021:

	Shares (In thousands)			Weighted Average Grant Date Fair Value
Unvested at December 31, 2020		142		$	88.99
Granted		67		$	150.89
Performance adjustment		28		$	67.72
Vested		(75	)	$	64.25
Forfeited		—		$	—
Unvested at October 1, 2021		162		$	122.26
Expected to vest as of October 1, 2021		177