Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended				3 Months Ended								3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Covenants not to compete	Dec. 31, 2013 Covenants not to compete	Mar. 31, 2014 Covenants not to compete Minimum	Mar. 31, 2014 Covenants not to compete Maximum	Mar. 31, 2014 Patents	Dec. 31, 2013 Patents	Mar. 31, 2014 Patents Minimum	Mar. 31, 2014 Patents Maximum	Mar. 31, 2014 Manufacturing technology	Dec. 31, 2013 Manufacturing technology	Mar. 31, 2014 Trademarks [Member]	Dec. 31, 2013 Trademarks [Member]	Mar. 31, 2014 Customer relationships, including backlog	Dec. 31, 2013 Customer relationships, including backlog	Mar. 31, 2014 Customer relationships, including backlog Minimum	Mar. 31, 2014 Customer relationships, including backlog Maximum
Summary of intangible assets
Life in Years					2 years	7 years			11 years	13 years							10 years	19 years
Goodwill	$ 143,170	$ 142,682
Trademarks and trade names	58,809	58,814
Total with indefinite lives	201,979	201,496
Total with finite lives, Gross Amount	122,223	117,253	6,092	1,112			5,320	5,320			2,637	2,639	549	549	107,625	107,633
Total intangible assets, Gross Amount	324,202	318,749
Total with finite lives, Accumulated Amortization	$ 52,102	$ 48,926	$ 1,225	$ 1,064			$ 2,096	$ 1,988			$ 2,637	$ 2,639	$ 45	$ 18	$ 46,099	$ 43,217