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Unaudited Quarterly Financial Data (Details Textual) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Unaudited Quarterly Financial Data (Textual) [Abstract]
Restructuring and reorganization charges recorded during the year	$ 4,900,000us-gaap_RestructuringCharges	$ 7,800,000us-gaap_RestructuringCharges		$ 1,200,000us-gaap_RestructuringCharges	$ 11,500,000us-gaap_RestructuringCharges			$ 900,000us-gaap_RestructuringCharges	$ 13,969,000us-gaap_RestructuringCharges	$ 12,405,000us-gaap_RestructuringCharges	$ 2,469,000us-gaap_RestructuringCharges
Impact of Restructuring expenses on EPS	$ 0.11	$ 0.12		$ 0.02	$ 0.25			$ 0.03
Effective income tax rate	24.00%	48.00%	47.00%	43.00%	27.00%	8.00%	36.00%	(10.00%)
Tax credits from R & D and from reduction of certain tax allowances related to foreign operations					$ 2,000,000	$ 6,000,000		$ 6,000,000

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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