Organization and Summary of Significant Accounting Policies (Details)		3 Months Ended				12 Months Ended
		Dec. 31, 2017 USD ($) supplier	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) supplier segment	Dec. 31, 2016 USD ($) supplier	Dec. 31, 2015 USD ($)	Jan. 01, 2017 USD ($)
Foreign Currency
Foreign currency transaction losses						$ 500,000	$ 700,000	$ 500,000
Inventory
Inventory write-down						28,100,000	12,100,000	9,000,000
Contract manufacturer and supplier liability						21,200,000	6,200,000	3,900,000
Impairment of Long-Lived Assets and Investments
Impairment of long-lived assets and investments						$ 0	0	0
Warranty
Warranty term on hardware products						1 year
Warranty term on software embedded in products						90 days
Segment Reporting
Number of business activities | segment						1
Number of reportable segments | segment						1
Stock-based Compensation
Excess tax benefits included in income taxes		$ 38,300,000	$ 23,800,000	$ 19,100,000	$ 28,800,000	$ 110,000,000
Excess tax benefits included in APIC							42,084,000	37,003,000
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease due to cumulative effect adjustment of adoption of new accounting pronouncement	[1]						(2,279,000)
Deferred tax assets		$ 65,125,000				65,125,000	70,960,000
Increase in net cash provided by operating activities	[2]					631,627,000	174,295,000	237,784,000
Decrease in net cash provided by financing activities	[2]					$ (51,469,000)	$ (32,745,000)	(25,854,000)
Supplier Concentration Risk
Product Information [Line Items]
Number of suppliers | supplier		3				3	3
Building
Property, Plant and Equipment [Line Items]
Estimated useful life						30 years
Other Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash		$ 5,500,000				$ 5,500,000	$ 4,200,000
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets									$ 1,800,000
Increase in net cash provided by operating activities							42,900,000	37,300,000
Decrease in net cash provided by financing activities							42,900,000	$ 37,300,000
Letter of Credit | Other Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash		$ 1,100,000				$ 1,100,000
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life						3 years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of the awards						2 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life						5 years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period of the awards						5 years
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease due to cumulative effect adjustment of adoption of new accounting pronouncement	[1]						(808,000)
Retained Earnings | Accounting Standards Update 2016-09, Excess Tax Benefit Component
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease due to cumulative effect adjustment of adoption of new accounting pronouncement									$ (1,800,000)
Retained Earnings | Accounting Standards Update 2016-09, Forfeiture Rate Component
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease due to cumulative effect adjustment of adoption of new accounting pronouncement							$ 1,000,000
Software Service, Support and Maintenance Arrangement | Minimum
Deferred Revenue Arrangement [Line Items]
PCS term of contract						1 year
Software Service, Support and Maintenance Arrangement | Maximum
Deferred Revenue Arrangement [Line Items]
PCS term of contract						3 years
Customer A | Accounts Receivable | Credit Concentration Risk
Product Information [Line Items]
Percentage of total per significant customer						30.00%	36.00%
Customer A | Revenue | Credit Concentration Risk
Product Information [Line Items]
Percentage of total per significant customer						16.00%	16.00%	12.00%
Customer B | Accounts Receivable | Credit Concentration Risk
Product Information [Line Items]
Percentage of total per significant customer						18.00%

[1] During our first fiscal quarter of 2017, we adopted Accounting Standards Update 2016-09, "Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." Refer to Note 1 - Recently Adopted Accounting Pronouncements for further details. This adoption resulted in a cumulative-effect adjustment to the beginning balance of Additional Paid-in Capital and Retained Earnings, respectively, for 2017.

[2] During our first fiscal quarter of 2017, we adopted Accounting Standards Update 2016-09, "Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." Refer to Note 1- Recently Adopted Accounting Pronouncements for further details. This adoption resulted in an increase in net cash provided by operating activities and a corresponding decrease in net cash provided by financing activities of $42.9 million and $37.3 million for the years ended December 31, 2016 and 2015, respectively.