Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting Information, Revenue for Reportable Segment [Abstract]

Reconciliation Of Sales To Earnings Before Income Taxes by Segment

The following table illustrates certain measurements used by management to assess performance of the segments described above for the three and six months ended June 30, (in thousands):

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2018			2017			2018			2017
Net sales:
Residential Products	$	131,128		$	127,252		$	235,076		$	231,803
Industrial and Infrastructure Products	61,561			57,926			116,185			108,644
Less: Intersegment sales	(368		)	(314		)	(589		)	(770		)
Net Industrial and Infrastructure Products	61,193			57,612			115,596			107,874
Renewable Energy and Conservation	73,715			62,763			130,701			114,555
Total consolidated net sales	$	266,036		$	247,627		$	481,373		$	454,232
Income from operations:
Residential Products	$	24,196		$	22,579		$	37,434		$	38,220
Industrial and Infrastructure Products	6,604			3,397			9,206			3,360
Renewable Energy and Conservation	9,556			3,492			13,618			6,832
Unallocated Corporate Expenses	(8,082		)	(4,538		)	(14,141		)	(13,803		)
Total income from operations	$	32,274		$	24,930		$	46,117		$	34,609

Disaggregation of Revenue

The following tables illustrate revenue disaggregated by timing of transfer of control to the customer for the three and six months ended June 30 (in thousands):

	Three Months Ended June 30, 2018
	Residential Products		Industrial and Infrastructure Products		Renewable Energy and Conservation		Total
Net sales:
Point in Time	$	130,958	$	51,428	$	8,724	$	191,110
Over Time	170		9,765		64,991		74,926
Total	$	131,128	$	61,193	$	73,715	$	266,036

	Three Months Ended June 30, 2017
	Residential Products		Industrial and Infrastructure Products		Renewable Energy and Conservation		Total
Net sales:
Point in Time	$	127,252	$	57,612	$	5,383	$	190,247
Over Time	—		—		57,380		57,380
Total	$	127,252	$	57,612	$	62,763	$	247,627