Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2018

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

Summary of Stock Option Activity

Stock option activity in the first three months of 2018 is summarized in the following table:

	Outstanding		Weighted Average Exercise Price		Remaining Contractual Life in Years		Aggregate Intrinsic Value
Balance at December 31, 2017		145,625	$	18.96		2.0	$	—
Granted		—	$	—
Exercised		—	$	—
Canceled		—	$	—
Expired		—	$	—
Balance at March 31, 2018		145,625	$	18.96		1.8	$	—
Options vested or expected to vest at March 31, 2018		145,625		18.96		1.8		—
Exercisable at March 31, 2018		145,625

Summary of Restricted Stock Unit Activity

Restricted stock unit activity in the first three months of 2018 is summarized in the following table:

	Number of Awards			Weighted Average Grant Date Fair Value		Weighted Average Remaining Amortization Period (in Years)
Balance at December 31, 2017		169,266		$	22.27		1.6
Granted		142,577		$	15.91
Vested		(36,141	)	$	21.96
Canceled		—		$	—
Balance at March 31, 2018		275,702		$	19.02		2.28

Summary of Restricted Performance Stock Unit Activity

Restricted performance stock unit activity in the first three months of 2018 is summarized in the following table:

	Number of Awards		Weighted Average Grant Date Fair Value		Weighted Average Remaining Amortization Period (in Years)
Balance at December 31, 2017		239,674	$	22.58		1.7
Granted		172,014	$	16.85
Vested		—	$	—
Canceled		—	$	—
Balance at March 31, 2018		411,688	$	20.18		2.52

Summary of Stock-based Compensation Expense

Stock-based compensation expense related to our equity incentive plans in accordance with U.S. GAAP was allocated as follows:

	Three Months Ended
	March 31, 2018			March 26, 2017
(Dollars in thousands)
Cost of sales	$	180		$	187
Selling, general and administrative expenses		553			1,092
Stock-based compensation expense before income taxes		733			1,279
Income tax benefit		(148	)		(472	)
Total stock-based compensation expense after income taxes	$	585		$	807