Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue From Contract With Customer [Abstract]

Schedule of Disaggregates Net Sales By Reporting Unit

The following table disaggregates our net sales by reporting unit, which are the categories that depict how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors (as required by ASC 606).

	Three months ended
	March 31,
	2017		2018
	(In thousands)
Net sales:
Security Products	$	26,010	$	24,056
Marine Components		3,938		4,357
Total net sales	$	29,948	$	28,413