Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Aug. 17, 2017	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses		$ 371,436
Proceeds from divestiture of businesses other than cash			$ 46,114
Precision Bearing Components Group [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration of disposal group	$ 375,000
Proceeds from divestiture of businesses		387,600
Cash proceeds from divestiture of businesses		388,500
Proceeds from divestiture of businesses other than cash		800
Estimated after-tax gain on sale		$ 127,700
Gain on cumulative foreign currency translation	$ 9,300