Acquisitions (Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Apr. 28, 2014 Aegis Flow Technologies [Member]
Business Acquisition [Line Items]
Accounts receivable			$ 1,069
Inventory			6,106
Other current assets, net of cash acquired			873
Property, plant and equipment			3,027
Goodwill	1,363,753	1,349,456	8,805
Intangible assets			8,770
Total assets acquired			28,650
Total liabilities assumed			(2,700)
Net assets acquired			$ 25,950