Acquisitions - Summary of Unaudited Consolidated Results of Operations, Including Proforma Results (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
As Reported
Net sales	$ 224,810	$ 186,549	$ 427,844	$ 357,618
Net income	$ 10,941	$ 9,483	$ 16,210	$ 24,286
Basic (in dollars per share)	$ 0.22	$ 0.19	$ 0.32	$ 0.51
Diluted (in dollars per share)	$ 0.21	$ 0.19	$ 0.31	$ 0.50
Pro Forma
Net sales				$ 360,378
Net income				$ 12,444
Basic (in dollars per share)				$ 0.26
Diluted (in dollars per share)				$ 0.26

Per basic share amount of pro forma income from continuing operations, after tax, as if the business combination had been completed at the beginning of a period.

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