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Restructuring and Severance (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Restructuring And Related Activities [Abstract]
Restructuring and Severance Beginning Balance			$ 1,149
Restructuring expense incurred and changes in estimates	1,825	1,252	2,874	1,252	1,800
Other cost reduction activities			309
Payments and non-cash item adjustment			(2,465)
Restructuring and Severance Ending Balance	$ 1,867		$ 1,867		$ 1,149

- Definition

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

+ References+ Details

- 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.

+ References+ Details