Income Taxes Deferred Tax Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred Tax Reconciliation [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Warranty Reserves	$ 1,166	$ 1,136
Deferred Tax Assets, Inventory	2,952	1,734
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Restructuring Charges	317	119
Deferred Tax Assets, Operating Loss Carryforwards	52,248	40,547
Deferred Tax Assets, Tax Credit Carryforwards	24,692	25,256
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	2,490	2,696
Deferred Tax Assets, in Process Research and Development	144	556
Deferred Tax Assets, Property, Plant and Equipment	2,437	2,179
Deferred Tax Assets, Goodwill and Intangible Assets	3,358	4,464
Deferred Tax Assets, Other	5,005	5,723
Deferred Tax Assets, Gross	94,809	84,410
Deferred Tax Assets, Valuation Allowance	(82,995)	(50,200)
Deferred Tax Assets, Net of Valuation Allowance	11,814	34,210
Deferred Tax Liabilities, Intangible Assets	(7,514)	(17,286)
Deferred Tax Liabilities, Other	(493)	(387)
Deferred Tax Liabilities, Net	(8,007)	(17,673)
Deferred Tax Assets, Net	$ 3,807	$ 16,537