Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Thousands		2 Months Ended	10 Months Ended	12 Months Ended			14 Months Ended
		Dec. 31, 2014	Oct. 16, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Oct. 17, 2014
Consideration
Payments to Acquire Businesses, Net of Cash Acquired				$ 10,000	$ 382,880	$ 84,790
Recognized amounts of identifiable assets acquired and liabilities assumed
Goodwill		$ 460,080		378,920	460,080	302,480	$ 378,920
Allfast Fasteners [Member]
Consideration
Payments to Acquire Businesses, Net of Cash Acquired			$ 351,220
Business Acquisition, Deferred Purchase Price	[1]		15,730
Business Combination, Consideration Transferred			366,950
Recognized amounts of identifiable assets acquired and liabilities assumed
Business Combination, Acquired Receivables, Fair Value								$ 8,950
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory								19,850
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	[2]							165,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets								340
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment								26,490
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities								(2,620)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net								218,010
Goodwill	[3]							148,940
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net								$ 366,950
Contingent Consideration Arrangements
Deferred Purchase Price, Tax Reimbursements			8,700
Deferred Purchase Price, Tax Reimbursements Paid to Seller				5,200
Deferred Purchase Price, Tax Reimbursements to Sellers Written Off				3,500
Deferred Purchase Price, Obligations Assumed on Behalf Seller			7,000
Deferred Purchase Price, Amount Paid thru 2015							$ 4,900
Acquired Intangible Assets Other than Goodwill
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual		9,100
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		$ 1,300
Business Acquisition, Transaction Costs					$ 2,200
Allfast Fasteners [Member] | Trademarks and Trade Names [Member]
Acquired Intangible Assets Other than Goodwill
Acquired Indefinite-lived Intangible Asset, Amount			49,000
Allfast Fasteners [Member] | Customer Relationships [Member]
Acquired Intangible Assets Other than Goodwill
Acquired Finite-lived Intangible Asset, Amount			$ 83,000
Finite-Lived Intangible Assets, Useful Life			18 years
Allfast Fasteners [Member] | Technology and Other [Member]
Acquired Intangible Assets Other than Goodwill
Acquired Finite-lived Intangible Asset, Amount			$ 33,000
Finite-Lived Intangible Assets, Useful Life			15 years
Series of Individually Immaterial Business Acquisitions [Member]
Consideration
Payments to Acquire Businesses, Net of Cash Acquired				$ 10,000		84,790
Business Acquisition, Deferred Purchase Price						2,600
Business Acquisition, Deferred Purchase Price and Contingent Consideration	[4]					4,280
Business Combination, Consideration Transferred						89,070
Recognized amounts of identifiable assets acquired and liabilities assumed
Business Combination, Acquired Receivables, Fair Value						7,240
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory						16,630
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	[5]					29,020
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets						8,420
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment						10,080
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities						(6,950)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Income Taxes						(4,260)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Long-term Liabilities						(8,410)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net						51,770
Goodwill						37,300
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net						89,070
Contingent Consideration Arrangements
Business Acquisition, Contingent Consideration						1,700
Series of Individually Immaterial Business Acquisitions [Member] | Trademarks and Trade Names [Member]
Acquired Intangible Assets Other than Goodwill
Acquired Indefinite-lived Intangible Asset, Amount						4,500
Series of Individually Immaterial Business Acquisitions [Member] | Customer Relationships [Member]
Acquired Intangible Assets Other than Goodwill
Acquired Finite-lived Intangible Asset, Amount						$ 23,100
Finite-Lived Intangible Assets, Useful Life						10 years
Series of Individually Immaterial Business Acquisitions [Member] | Technology and Other [Member]
Acquired Intangible Assets Other than Goodwill
Acquired Finite-lived Intangible Asset, Amount						$ 1,400
Finite-Lived Intangible Assets, Useful Life						4 years

[1] Of the deferred purchase price, approximately $8.7 million, represents the Company's best estimate of the underlying obligations for certain tax amounts the Company has agreed to reimburse the previous owner in order to acquire additional tax attributes. During 2015, the Company paid $5.2 million of such amount and the remaining $3.5 million liability was removed, with a corresponding reduction to goodwill, due to the finalization of the Seller's tax liability. In addition, deferred purchase price includes approximately $7.0 million of other liabilities which the Company has agreed to pay on behalf of the previous owner, of which approximately $4.9 million was paid through December 31, 2015.

[2] Consists of approximately $83.0 million of customer relationships with an estimated useful life of 18 years, $33.0 million of technology and other intangible assets with an estimated useful life of 15 years and $49.0 million of trademark/trade name with an indefinite useful life.

[3] All of the goodwill was assigned to the Company's Aerospace reportable segment and is expected to be deductible for tax purposes.

[4] Deferred/contingent consideration included approximately $2.6 million of both short-term and long-term deferred purchase price, based on set amounts and fixed payment schedules per the purchase agreement, and an additional $1.7 million of contingent consideration to be paid, if earned, based on a multiple of future earnings, as defined.

[5] Consists of approximately $23.1 million of customer relationships with an estimated weighted average useful life of 10 years, $1.4 million of technology and other intangible assets with an estimated weighted average useful life of four years and $4.5 million of trademark/trade names with an indefinite useful life