Acquisitions and Divestitures - Acquired Intangible Assets and Weighted Average Amortization Periods (Details) - USD ($) $ in Thousands			12 Months Ended
	Mar. 16, 2016	Apr. 28, 2014	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets			$ 64,359
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets			$ 9,247
Weighted Average Life			15 years
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets			$ 44,401
Weighted Average Life			12 years
Unpatented technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets			$ 10,711
Weighted Average Life			8 years
Akron Brass
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 188,877
Indefinite lived	28,800
Total acquired intangible assets	217,677
Akron Brass | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 14,078
Weighted Average Life	15 years
Akron Brass | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 134,519
Weighted Average Life	13 years
Akron Brass | Unpatented technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets	$ 40,280
Weighted Average Life	13 years
Aegis
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets		$ 8,770
Aegis | Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets		$ 3,304
Weighted Average Life		15 years
Aegis | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets		$ 4,393
Weighted Average Life		14 years
Aegis | Unpatented technology
Acquired Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets		$ 1,073
Weighted Average Life		8 years