Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 30, 2012	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Standard Product Warranty Accrual	$ 24,246us-gaap_StandardProductWarrantyAccrual	$ 33,827us-gaap_StandardProductWarrantyAccrual	$ 44,486us-gaap_StandardProductWarrantyAccrual	$ 37,033us-gaap_StandardProductWarrantyAccrual	$ 13,181us-gaap_StandardProductWarrantyAccrual
Shipping and Handling Revenue	(8,855)us-gaap_ShippingAndHandlingRevenue	(12,213)us-gaap_ShippingAndHandlingRevenue	(10,111)us-gaap_ShippingAndHandlingRevenue
Shipping, Handling and Transportation Costs	15,913	15,927	13,344
Advertising Expense	3,914us-gaap_AdvertisingExpense	4,515us-gaap_AdvertisingExpense	4,828us-gaap_AdvertisingExpense
Research and Development Expense	$ 15,588us-gaap_ResearchAndDevelopmentExpense	$ 14,941us-gaap_ResearchAndDevelopmentExpense	$ 14,398us-gaap_ResearchAndDevelopmentExpense

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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-Publisher FASB

-Name Accounting Standards Codification

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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- Definition

Fees charged to customers for the delivery, generally by postal or freight service providers, of product or goods purchased.

+ References

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Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

+ References

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Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

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