Acquisitions (Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Apr. 28, 2014 Aegis Flow Technologies
Business Acquisition [Line Items]
Accounts receivable			$ 1,147
Inventory			6,106
Other current assets, net of cash acquired			230
Property, plant and equipment			3,019
Goodwill	1,336,353	1,349,456	7,787
Intangible assets			8,770
Total assets acquired			27,059
Total liabilities assumed			(1,617)
Net assets acquired			$ 25,442