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Related Party Transactions - Schedule of Related Party Transactions (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transactions [Abstract]
Sales	$ 6,026us-gaap_RevenueFromRelatedParties	$ 1,188us-gaap_RevenueFromRelatedParties	$ 1,689us-gaap_RevenueFromRelatedParties
Purchases	3,100	10,292	3,668
Rent	$ 600	$ 671	$ 288

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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