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, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
As Reported
Net sales	$ 255,532		$ 224,810		$ 493,881	$ 427,844
Net income	$ 6,859	$ 6,195	$ 10,941	$ 5,269	$ 13,054	$ 16,210
Basic (in dollars per share)	$ 0.12		$ 0.22		$ 0.24	$ 0.32
Diluted (in dollars per share)	$ 0.12		$ 0.21		$ 0.23	$ 0.31
Pro Forma
Net sales			$ 238,272			$ 452,451
Net income			$ 6,842			$ 5,016
Basic, Pro Forma (in dollars per share)			$ 0.14			$ 0.10
Diluted, Pro Forma (in dollars per share)			$ 0.13			$ 0.10

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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