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Acquisitions - Summary of Final Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Oct. 19, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Aug. 29, 2014 | Dec. 31, 2013
--- | --- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |  |
Property, plant, and equipment | $ 59,100 |  | $ 168,500 |  |  |
Goodwill | $ 449,898 |  | 83,941 |  |  | $ 8,624
Total assets acquired |  |  | 21,000 |  |  |
Other Acquisitions [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Current assets |  |  | 5,565 | $ 5,688 |  |
Property, plant, and equipment |  |  | 15,336 | 15,367 |  |
Intangible assets subject to amortization |  |  | 2,705 | 2,705 |  |
Goodwill |  |  | 2,494 | 2,038 |  |
Total assets acquired |  |  | 26,100 | 25,798 |  |
Current liabilities |  |  | 5,105 | 4,803 |  |
Total liabilities assumed |  |  | 5,105 | 4,803 |  |
Net asset acquired |  |  | 20,995 | 20,995 |  |
Other Acquisitions [Member] | Adjustments to Fair Value [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Current assets |  |  | (123) |  |  |
Property, plant, and equipment |  |  | (31) |  |  |
Goodwill |  |  | 456 |  |  |
Total assets acquired |  |  | 302 |  |  |
Current liabilities |  |  | 302 |  |  |
Total liabilities assumed |  |  | 302 |  |  |
Autocam [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Current assets |  |  | 87,347 | 88,529 |  |
Property, plant, and equipment |  |  | 153,185 | 146,120 |  |
Intangible assets subject to amortization |  |  | 51,660 | 51,098 |  |
Investment in joint venture |  |  | 35,595 | 35,595 |  |
Other non-current assets |  |  | 6,068 | 2,170 |  |
Goodwill |  |  | 73,992 | 77,548 |  |
Total assets acquired |  |  | 407,847 | 401,060 |  |
Current liabilities |  |  | 41,283 | 34,320 |  |
Current maturities of long-term debt |  |  | 6,547 | 6,547 |  |
Non-current deferred tax liabilities |  |  | 46,512 | 46,998 |  |
Obligations under capital lease |  |  | 18,350 | 18,350 |  |
Long-term debt, net of current portion |  |  | 4,263 | 4,263 |  |
Other non-current liabilities |  |  | 2,338 | 2,028 |  |
Total liabilities assumed |  |  | 119,293 | 112,506 |  |
Net asset acquired |  |  | $ 288,554 | $ 288,554 |  |
Autocam [Member] | Adjustments to Fair Value [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Current assets |  |  |  |  | $ (1,182) |
Property, plant, and equipment |  |  |  |  | 7,065 |
Intangible assets subject to amortization |  |  |  |  | 562 |
Other non-current assets |  |  |  |  | 3,898 |
Goodwill |  |  |  |  | (3,556) |
Total assets acquired |  |  |  |  | 6,787 |
Current liabilities |  |  |  |  | 6,963 |
Non-current deferred tax liabilities |  |  |  |  | (486) |
Other non-current liabilities |  |  |  |  | 310 |
Total liabilities assumed |  |  |  |  | $ 6,787 |
PEP [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Current assets |  | $ 69,331 |  |  |  |
Property, plant, and equipment |  | 56,163 |  |  |  |
Intangible assets subject to amortization |  | 240,490 |  |  |  |
Other non-current assets |  | 1,500 |  |  |  |
Goodwill |  | 364,450 |  |  |  |
Total assets acquired |  | 731,934 |  |  |  |
Current liabilities |  | 21,131 |  |  |  |
Non-current deferred tax liabilities |  | 87,578 |  |  |  |
Other non-current liabilities |  | 2,029 |  |  |  |
Total liabilities assumed |  | 110,738 |  |  |  |
Net asset acquired |  | $ 621,196 |  |  |  |

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