Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 28, 2019

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (Unaudited)

(in thousands, except per share data)
	2019								2018
	4Q(a)		3Q(b)		2Q(c)		1Q(d)		4Q(e)		3Q(f)		2Q(g)		1Q(h)
Net sales	$	338,523	$	361,971	$	397,879	$	405,500	$	402,281	$	439,191	$	459,183	$	417,813
Gross profit	113,467		130,946		141,808		155,228		154,337		179,594		168,987		149,623
Operating income	32,317		47,167		52,634		60,673		51,628		76,228		59,622		37,571
Net income	22,654		35,647		43,792		36,989		32,665		53,546		42,326		36,029
Net income per share
Basic	$	0.93	$	1.46	$	1.77	$	1.50	$	1.31	$	2.13	$	1.69	$	1.48
Diluted	$	0.92	$	1.44	$	1.75	$	1.48	$	1.29	$	2.10	$	1.67	$	1.45

(a)In the fourth quarter of 2019, the Company recorded $1.9 million in acquisition-related and integration costs and $2.1 million in restructuring, impairment and other costs, and $4.2 million impairment charges related to certain other investments, partially offset by a $3.3 million benefit for previously unrecognized tax benefits in respect of which the statute of limitation has expired.

(b)In the third quarter of 2019, the Company recorded $3.2 million in acquisition-related and integration costs and $2.5 million in restructuring and impairment charge

(c)In the second quarter of 2019, the Company recorded $5.7 million in restructuring and impairment charges, $1.5 million in acquisition-related and integration costs, and $0.4 million costs primarily related to a sale of building and $0.2 million impairment charges related to a certain other investment.

(d)In the first quarter of 2019, the Company recorded $2.8 million impairment charges to certain other investments, $2.6 million loss on the disposal of a business, $2.7 million in restructuring costs, $2.4 million in acquisition-related and integration costs, and $0.3 million gain primarily related to the final payments for the acquisition of Monolith

(e)In the fourth quarter of 2018, the Company recorded an estimated one-time tax charge of $3.2 million related to the finalization of 2017 provisional reasonable estimate in connection with the Tax Act, partially offset by a $1.5 million benefit for previously unrecognized tax benefits in respect of which the statute of limitation has expired, $3.7 million in backlog amortization expense from the IXYS acquisition, $3.2 million in acquisition-related and integration costs and $2.4 million in restructuring, impairment and other costs.

(f)In the third quarter of 2018, the Company recorded $5.2 million in restructuring and impairment charges, $3.1 million in backlog amortization expense from the IXYS acquisition and $2.9 million in acquisition-related and integration costs

(g)In the second quarter of 2018, the Company recorded $19.0 million for purchase accounting inventory adjustments associated with the acquisition of IXYS, $4.2 million in restructuring and impairment charges, $3.1 million in backlog amortization expense from the IXYS acquisition $2.4 million in acquisition-related and integration costs.

(h)In the first quarter of 2018, the Company recorded $17.9 million for purchase accounting inventory adjustments associated with the acquisition of IXYS, $11.7 million in acquisition-related and integration costs, $4.5 million of stock compensation expense recognized immediately upon close for converted IXYS options related to prior services periods, $2.5 million in backlog amortization expense,$2.1 million expense related to change in control and $0.8 million in restructuring costs.