Organization and Summary of Significant Accounting Policies Risks - Concentration Revenue, Accounts Receivable and Dependence on Suppliers (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 customer	Dec. 31, 2012 customer	Dec. 31, 2011
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers	$ 41,300,000		$ 46,900,000
Percentage of Product Revenue from Foreign Countries	11.20%	7.50%	2.00%
customers with 10% revenue concentration	0	0
customers with 10 % accts rec concentration	0	0
Trading Securities		0
Held-to-maturity Securities, Fair Value		0
Purchases from significant supplier	29,200,000	23,800,000	21,100,000
Lease Agreements [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers		60,900,000
Lease Transfers In Ending Accounts Receivable	$ 100,000	$ 700,000	$ 200,000
Equipment [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, Plant and Equipment, Useful Life	5 years