Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Goodwill and other intangible assets	$ 14,066	$ 15,024
Stock-based compensation	7,172	5,116
Deferred compensation	5,040	3,722
Warranty	7,845	3,477
Inventory	3,897us-gaap_DeferredTaxAssetsInventory	3,245us-gaap_DeferredTaxAssetsInventory
Other	3,189us-gaap_DeferredTaxAssetsOther	4,048us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	41,209us-gaap_DeferredTaxAssetsGross	34,632us-gaap_DeferredTaxAssetsGross
Fixed assets	(10,756)	(9,839)
Net deferred tax assets	$ 30,453us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 24,793us-gaap_DeferredTaxAssetsLiabilitiesNet

Deferred Tax Assets, Share-based Compensation

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from inventory.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from employee compensation.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from warranty reserves.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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