Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Accumulated Deficit)	Non-Controlling Interest [Member]
Beginning balance at Dec. 31, 2016	$ 796,819	$ 33	$ 566,307	$ 1,938	$ 228,541
Beginning balance (in shares) at Dec. 31, 2016		32,958,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on available-for-sale investments, net of tax	(73)			(73)
Change in unrealized gains and losses on derivatives, net of tax	(2,716)			(2,716)
Net income (loss)	19,436				19,436
Net loss attributable to non-controlling interest	0
Stock-based compensation	22,147		22,147
Repurchase of common stock	$ (113,161)	$ (2)			(113,159)
Repurchase of common stock (in shares)	(2,400,000)	(2,378,000)
Restricted stock unit withholdings	$ (6,415)				(6,415)
Restricted stock unit withholdings (in shares)	(135,000)	(135,000)
Issuance of common stock under stock-based compensation plans	$ 14,356		14,356
Issuance of common stock under stock-based compensation plans (in shares)		875,000
Cumulative-effect adjustment from adoption of ASU	92		327		(235)
Ending balance at Dec. 31, 2017	730,485	$ 31	603,137	(851)	128,168
Ending balance (in shares) at Dec. 31, 2017		31,320,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on available-for-sale investments, net of tax	78			78
Change in unrealized gains and losses on derivatives, net of tax	758			758
Net income (loss)	(9,162)				(9,162)
Net loss attributable to non-controlling interest	(9,167)					$ (9,167)
Stock-based compensation	31,966		31,966
Stock-based compensation for Arlo's shares	942					942
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	170,246		146,088			24,158
Repurchase of common stock	$ (30,000)				(30,000)
Repurchase of common stock (in shares)	(500,000)	(473,000)
Restricted stock unit withholdings	$ (8,065)				(8,065)
Restricted stock unit withholdings (in shares)	(138,000)	(138,000)
Issuance of common stock under stock-based compensation plans	$ 12,395	$ 1	12,394
Issuance of common stock under stock-based compensation plans (in shares)		853,000
Distribution of Arlo	(271,517)				(255,584)	$ (15,933)
Cumulative-effect adjustment from adoption of ASU	8,593				8,593
Ending balance at Dec. 31, 2018	627,552	$ 32	793,585	(15)	(166,050)
Ending balance (in shares) at Dec. 31, 2018		31,562,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on available-for-sale investments, net of tax	12			12
Change in unrealized gains and losses on derivatives, net of tax	24			24
Net income (loss)	25,791				25,791
Net loss attributable to non-controlling interest	0
Stock-based compensation	29,137		29,137
Repurchase of common stock	$ (75,946)	$ (3)			(75,943)
Repurchase of common stock (in shares)	(2,400,000)	(2,406,000)
Restricted stock unit withholdings	$ (6,521)				(6,521)
Restricted stock unit withholdings (in shares)	(198,000)	(198,000)
Issuance of common stock under stock-based compensation plans	$ 8,644	$ 1	8,643
Issuance of common stock under stock-based compensation plans (in shares)		967,000
Ending balance at Dec. 31, 2019	$ 608,693	$ 30	$ 831,365	$ 21	$ (222,723)
Ending balance (in shares) at Dec. 31, 2019		29,925,000