Acquisitions (Unaudited Supplemental Pro Forma Information) (Detail) - USD ($) $ / shares in Units, $ in Thousands	7 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
C Technologies [Member]
Business Acquisition [Line Items]
Total revenue		$ 279,434	$ 217,739
Net income (loss)	$ 7,400	$ 23,394	$ 21,195
Basic		$ 0.48	$ 0.44
Diluted		$ 0.48	$ 0.43
Spectrum Inc. [Member]
Business Acquisition [Line Items]
Total revenue				$ 162,913
Net income (loss)				$ 17,220
Basic				$ 0.41
Diluted				$ 0.40