Segment Information - Additional Information (Detail) - USD ($) $ in Thousands	2 Months Ended	3 Months Ended		4 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Sales revenue		$ 196,349	$ 157,947		$ 365,497	$ 315,502
Income from discontinued operations, net of tax (Note 2)		$ (24,511)	$ (21,138)		$ (30,494)	$ (13,727)
Paragon Medical Inc [Member]
Segment Reporting Information [Line Items]
Sales revenue	$ 27,100
Income from discontinued operations, net of tax (Note 2)	$ 1,700
Bridgemedica, LLC [Member]
Segment Reporting Information [Line Items]
Sales revenue				$ 3,600
Income from discontinued operations, net of tax (Note 2)				$ 100