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Costs Associated with Exit and Restructuring - Liabilities and Expenses Related to Exit and Restructuring Activities (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring and Related Activities [Abstract]
Balance at beginning of period	$ 1,252us-gaap_RestructuringReserve	$ 967us-gaap_RestructuringReserve	$ 1,048us-gaap_RestructuringReserve
Charged to earnings	6,007us-gaap_RestructuringCharges	5,890us-gaap_RestructuringCharges	960us-gaap_RestructuringCharges
Cash paid	(429)us-gaap_PaymentsForRestructuring	(5,605)us-gaap_PaymentsForRestructuring	(1,041)us-gaap_PaymentsForRestructuring
Balance at the end of period	$ 6,830us-gaap_RestructuringReserve	$ 1,252us-gaap_RestructuringReserve	$ 967us-gaap_RestructuringReserve

- 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