Acquisitions - Summary of Estimated Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Aug. 29, 2014
Business Acquisition [Line Items]
Intangible assets subject to amortization	$ 57,226
Goodwill	$ 85,447	$ 83,941
Autocam [Member]
Business Acquisition [Line Items]
Current assets			$ 88,529
Property, plant, and equipment			146,120
Intangible assets subject to amortization			51,098
Investment in joint venture			35,595
Other non-current assets			2,170
Goodwill			77,548
Total assets acquired			401,060
Current liabilities			34,320
Current maturities of long-term debt			6,547
Non-current deferred tax liabilities			46,998
Obligations under capital lease			18,350
Long-term debt, net of current portion			4,263
Other non-current liabilities			2,028
Total liabilities assumed			112,506
Net asset acquired			$ 288,554