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Acquisitions and Divestitures - Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Aug. 31, 2016 | Jul. 01, 2016 | Mar. 16, 2016 | Dec. 31, 2015 | Jul. 01, 2015 | Jun. 10, 2015 | May 29, 2015 | Dec. 31, 2014 | Apr. 28, 2014
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Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  | $ 29,900 |  |  |  |  |  |  |  |
Inventory |  | 62,170 |  |  |  |  |  |  |  |
Other current assets, net of cash acquired |  | 5,512 |  |  |  |  |  |  |  |
Property, plant and equipment |  | 24,167 |  |  |  |  |  |  |  |
Goodwill | $ 1,632,592 | 290,393 |  |  | $ 1,396,529 |  |  |  | $ 1,321,277 |
Intangible assets |  | 217,677 |  |  |  |  |  |  |  |
Deferred income taxes |  | 3,515 |  |  |  |  |  |  |  |
Total assets acquired |  | 633,334 |  |  |  |  |  |  |  |
Current liabilities |  | (22,186) |  |  |  |  |  |  |  |
Deferred income taxes |  | (77,809) |  |  |  |  |  |  |  |
Other noncurrent liabilities |  | (23,338) |  |  |  |  |  |  |  |
Net assets acquired |  | 510,001 |  |  |  |  |  |  |  |
Akron Brass |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  | $ 14,523 |  |  |  |  |  |
Inventory |  |  |  | 29,157 |  |  |  |  |  |
Other current assets, net of cash acquired |  |  |  | 446 |  |  |  |  |  |
Property, plant and equipment |  |  |  | 12,195 |  |  |  |  |  |
Goodwill |  |  |  | 124,643 |  |  |  |  |  |
Intangible assets |  |  |  | 90,400 |  |  |  |  |  |
Deferred income taxes |  |  |  | 0 |  |  |  |  |  |
Total assets acquired |  |  |  | 271,364 |  |  |  |  |  |
Current liabilities |  |  |  | (7,081) |  |  |  |  |  |
Deferred income taxes |  |  |  | (36,439) |  |  |  |  |  |
Other noncurrent liabilities |  |  |  | (6,445) |  |  |  |  |  |
Net assets acquired |  |  |  | $ 221,399 |  |  |  |  |  |
AWG Fittings |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  | $ 5,952 |  |  |  |  |  |  |
Inventory |  |  | 11,766 |  |  |  |  |  |  |
Other current assets, net of cash acquired |  |  | 565 |  |  |  |  |  |  |
Property, plant and equipment |  |  | 6,847 |  |  |  |  |  |  |
Goodwill |  |  | 22,031 |  |  |  |  |  |  |
Intangible assets |  |  | 10,279 |  |  |  |  |  |  |
Deferred income taxes |  |  | 3,515 |  |  |  |  |  |  |
Total assets acquired |  |  | 60,955 |  |  |  |  |  |  |
Current liabilities |  |  | (5,017) |  |  |  |  |  |  |
Deferred income taxes |  |  | 0 |  |  |  |  |  |  |
Other noncurrent liabilities |  |  | (8,444) |  |  |  |  |  |  |
Net assets acquired |  |  | $ 47,494 |  |  |  |  |  |  |
SFC-Koenig |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  | 9,425 |  |  |  |  |  |  |  |
Inventory |  | 21,247 |  |  |  |  |  |  |  |
Other current assets, net of cash acquired |  | 4,501 |  |  |  |  |  |  |  |
Property, plant and equipment |  | 5,125 |  |  |  |  |  |  |  |
Goodwill |  | 143,719 |  |  |  |  |  |  |  |
Intangible assets |  | 116,998 |  |  |  |  |  |  |  |
Deferred income taxes |  | 0 |  |  |  |  |  |  |  |
Total assets acquired |  | 301,015 |  |  |  |  |  |  |  |
Current liabilities |  | (10,088) |  |  |  |  |  |  |  |
Deferred income taxes |  | (41,370) |  |  |  |  |  |  |  |
Other noncurrent liabilities |  | (8,449) |  |  |  |  |  |  |  |
Net assets acquired |  | $ 241,108 |  |  |  |  |  |  |  |
Novotema |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  | $ 8,029 |  |
Inventory |  |  |  |  |  |  |  | 2,886 |  |
Other current assets, net of cash acquired |  |  |  |  |  |  |  | 1,866 |  |
Property, plant and equipment |  |  |  |  |  |  |  | 11,844 |  |
Goodwill |  |  |  |  |  |  |  | 34,316 |  |
Intangible assets |  |  |  |  | 20,000 |  |  | 20,011 |  |
Total assets acquired |  |  |  |  |  |  |  | 78,952 |  |
Current liabilities |  |  |  |  |  |  |  | (7,760) |  |
Deferred income taxes |  |  |  |  |  |  |  | (7,803) |  |
Other noncurrent liabilities |  |  |  |  |  |  |  | (2,291) |  |
Net assets acquired |  |  |  |  |  |  |  | $ 61,098 |  |
Alfa Valvole |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  | $ 13,487 |  |  |
Inventory |  |  |  |  |  |  | 11,036 |  |  |
Other current assets, net of cash acquired |  |  |  |  |  |  | 3,367 |  |  |
Property, plant and equipment |  |  |  |  |  |  | 8,395 |  |  |
Goodwill |  |  |  |  |  |  | 69,568 |  |  |
Intangible assets |  |  |  |  | 32,100 |  | 32,058 |  |  |
Total assets acquired |  |  |  |  |  |  | 137,911 |  |  |
Current liabilities |  |  |  |  |  |  | (11,279) |  |  |
Deferred income taxes |  |  |  |  |  |  | (12,622) |  |  |
Other noncurrent liabilities |  |  |  |  |  |  | (1,420) |  |  |
Net assets acquired |  |  |  |  |  |  | $ 112,590 |  |  |
CPS |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  | $ 945 |  |  |  |
Inventory |  |  |  |  |  | 442 |  |  |  |
Other current assets, net of cash acquired |  |  |  |  |  | 79 |  |  |  |
Property, plant and equipment |  |  |  |  |  | 1,105 |  |  |  |
Goodwill |  |  |  |  |  | 9,739 |  |  |  |
Intangible assets |  |  |  |  | 12,300 | 12,290 |  |  |  |
Total assets acquired |  |  |  |  |  | 24,600 |  |  |  |
Current liabilities |  |  |  |  |  | (420) |  |  |  |
Deferred income taxes |  |  |  |  |  | 0 |  |  |  |
Other noncurrent liabilities |  |  |  |  |  | 0 |  |  |  |
Net assets acquired |  |  |  |  |  | $ 24,180 |  |  |  |
Other |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | 0 |  |  |  |  |
Inventory |  |  |  |  | 1,102 |  |  |  |  |
Other current assets, net of cash acquired |  |  |  |  | 0 |  |  |  |  |
Property, plant and equipment |  |  |  |  | 0 |  |  |  |  |
Goodwill |  |  |  |  | 748 |  |  |  |  |
Intangible assets |  |  |  |  | 0 |  |  |  |  |
Total assets acquired |  |  |  |  | 1,850 |  |  |  |  |
Current liabilities |  |  |  |  | 0 |  |  |  |  |
Deferred income taxes |  |  |  |  | 0 |  |  |  |  |
Other noncurrent liabilities |  |  |  |  | 0 |  |  |  |  |
Net assets acquired |  |  |  |  | 1,850 |  |  |  |  |
Acquisitions in 2015 |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  | 22,461 |  |  |  |  |
Inventory |  |  |  |  | 15,466 |  |  |  |  |
Other current assets, net of cash acquired |  |  |  |  | 5,312 |  |  |  |  |
Property, plant and equipment |  |  |  |  | 21,344 |  |  |  |  |
Goodwill |  |  |  |  | 114,371 |  |  |  |  |
Intangible assets |  |  |  |  | 64,359 |  |  |  |  |
Total assets acquired |  |  |  |  | 243,313 |  |  |  |  |
Current liabilities |  |  |  |  | (19,459) |  |  |  |  |
Deferred income taxes |  |  |  |  | (20,425) |  |  |  |  |
Other noncurrent liabilities |  |  |  |  | (3,711) |  |  |  |  |
Net assets acquired |  |  |  |  | $ 199,718 |  |  |  |  |
Aegis |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  |  |  |  |  | $ 1,147
Inventory |  |  |  |  |  |  |  |  |  | 6,230
Other current assets, net of cash acquired |  |  |  |  |  |  |  |  |  | 232
Property, plant and equipment |  |  |  |  |  |  |  |  |  | 2,988
Goodwill |  |  |  |  |  |  |  |  |  | 7,711
Intangible assets |  |  |  |  |  |  |  |  |  | 8,770
Total assets acquired |  |  |  |  |  |  |  |  |  | 27,078
Current liabilities |  |  |  |  |  |  |  |  |  | (1,633)
Net assets acquired |  |  |  |  |  |  |  |  |  | $ 25,445

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