Acquisitions and Divestitures (Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 16, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill	$ 1,516,303		$ 1,396,529
Akron Brass
Business Acquisition [Line Items]
Current assets, net of cash acquired		$ 44,887
Property, plant and equipment		12,452
Goodwill	123,900	123,855
Intangible assets	$ 90,400	90,400
Total assets acquired		271,594
Current liabilities		(6,757)
Deferred tax liability		(36,836)
Other noncurrent liabilities		(6,445)
Net assets acquired		$ 221,556