Acquisitions - Other Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Series of Individually Immaterial Business Acquisitions [Member]	Dec. 31, 2013 Business Acquisition, Martinic [Member]	Dec. 31, 2013 Business Acquisition, Wulfrun [Member]	Mar. 31, 2013 Business Acquisiton, Witter [Domain]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			$ 0	$ 46,610	$ 47,000
Net sales	$ 403,980	$ 378,030	$ 771,720	$ 715,810		$ 13,000	$ 10,000	$ 20,000