Basis of Presentation (Details 5) (USD $)	3 Months Ended									1 Months Ended		1 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Mar. 31, 2014 North America	Dec. 31, 2013 North America	Mar. 31, 2013 North America	Mar. 31, 2014 Europe	Dec. 31, 2013 Europe	Mar. 31, 2013 Europe	Feb. 28, 2013 ShearBrace	Feb. 28, 2013 ShearBrace North America	Nov. 30, 2013 Bierbach	Nov. 30, 2013 Bierbach Europe	Mar. 31, 2014 S&P Clever
Acquisitions
Cash paid for acquisition										$ 5,300,000		$ 1,200,000
Contingent consideration payable												800,000
Goodwill	129,433,000	129,218,000	122,582,000	84,690,000	84,822,000	81,205,000	42,982,000	42,690,000	39,390,000		900,000		700,000
Intangible assets										3,600,000		600,000
Weighted-average amortization period										11 years 3 months 18 days
Maximum period for payment for adjustments to provisional fair value measurements	1 year
Deferred consideration paid														1,100,000
Contingent consideration paid														200,000
Deferred and contingent consideration payable														$ 1,500,000