Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2017

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

Share-Based Compensation Expense Recorded In Income from Continuing Operations in Statements of Operations

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

	Three Months Ended
	March 31,		April 1,
	2017		2016
Selling, general and administrative	$	1,358	$	1,243
Research and development and engineering		43		25
Cost of revenue		68		74
Total share-based compensation expense	$	1,469	$	1,342

Fair Value of TSR Performance-Based Restricted Stock Units Estimated Using Monte-Carol Valuation Model

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

	Three Months Ended March 31, 2017
Grant-date stock price	$	24.30
Expected volatility		28.6	%
Risk-free interest rate		1.44	%
Expected annual dividend yield		—
Weighted average fair value	$	33.31

2010 Incentive Award Plan

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

Restricted Stock 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 three months ended March 31, 2017:

	Shares (In thousands)			Weighted Average Grant Date Fair Value
Unvested at December 31, 2016		635		$	13.97
Granted		220		$	24.00
Vested		(189	)	$	13.87
Forfeited		(1	)	$	16.52
Unvested at March 31, 2017		665		$	17.32
Expected to vest as of March 31, 2017		614

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 three months ended March 31, 2017:

	Shares (In thousands)		Weighted Average Grant Date Fair Value
Unvested at December 31, 2016		29	$	14.13
Granted		60	$	28.81
Vested		—	$	—
Forfeited		—	$	—
Unvested at March 31, 2017		89	$	24.00