Cash, Cash Equivalents, and Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		$ 652,816
Amortized Cost	$ 492,350
Gross Unrealized Gains		401
Gross Unrealized Gains	5
Gross Unrealized Losses		(128)
Gross Unrealized Losses	(18,101)
Fair Value		653,089
Fair Value	474,254
Cash and Cash Equivalents	356,332	155,443
Marketable Securities	72,180
Cash and cash equivalents, Expected credit loss reserve		(3)
Cash and cash equivalents, Net of expected credit loss reserve		155,440
Cash and cash equivalents	356,332	155,440	$ 172,250
Short-term investments	14,510	406,525
Long-term investments	31,232	90,681
Marketable securities, unrealized gain (loss)	(17,800)
Carrying amount of held-to-maturity securities sold	165,400
Credit loss reserve for held-to-maturity investments		200
Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments, Expected credit loss reserve		(142)
Short-term investments, Net of expected credit loss reserve		406,525
Short-term investments		406,667
Long-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term investments, Expected credit loss reserve		(25)
Long-term investments, Net of expected credit loss reserve		90,681
Long-term investments		90,706
Common stock | Share Purchase Agreement with Cellebrite DI Ltd.
Restricted Cash and Cash Equivalents Items [Line Items]
Marketable Securities	$ 90,000
Investment owned, shares held	9,000,000
Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		183,789
Amortized Cost	$ 103,544
Gross Unrealized Gains		128
Gross Unrealized Gains	4
Gross Unrealized Losses	(17,820)
Fair Value		183,917
Fair Value	85,728
Cash and Cash Equivalents	2,844	23,611
Marketable Securities	72,180
Short-term investments	10,704
Fair Value, Inputs, Level 1 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		120,178
Fair Value, Inputs, Level 1 | Long-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term investments		40,000
Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		352,920
Amortized Cost	35,318
Gross Unrealized Gains		273
Gross Unrealized Gains	1
Gross Unrealized Losses		(128)
Gross Unrealized Losses	(281)
Fair Value		353,065
Fair Value	35,038
Cash and Cash Equivalents		15,725
Short-term investments	3,806
Long-term investments	31,232
Fair Value, Inputs, Level 2 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		286,489
Fair Value, Inputs, Level 2 | Long-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term investments		50,706
Cash
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		116,107
Amortized Cost	353,488
Fair Value		116,107
Fair Value	353,488
Cash and Cash Equivalents	353,488	116,107
Money market funds | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		23,611
Amortized Cost	2,844
Fair Value		23,611
Fair Value	2,844
Cash and Cash Equivalents	2,844	23,611
Agency bonds | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		63,794
Amortized Cost	10,700
Gross Unrealized Gains		122
Gross Unrealized Gains	4
Fair Value		63,916
Fair Value	10,704
Short-term investments	10,704
Agency bonds | Fair Value, Inputs, Level 1 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		23,794
Agency bonds | Fair Value, Inputs, Level 1 | Long-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term investments		40,000
Marketable securities | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	90,000
Gross Unrealized Losses	(17,820)
Fair Value	72,180
Marketable Securities	72,180
Treasury bills | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		96,384
Gross Unrealized Gains		6
Fair Value		96,390
Treasury bills | Fair Value, Inputs, Level 1 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		96,384
State and municipal obligations | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		77,130
Amortized Cost	2,570
Gross Unrealized Gains		25
Gross Unrealized Losses		(28)
Gross Unrealized Losses	(5)
Fair Value		77,127
Fair Value	2,565
Short-term investments	1,400
Long-term investments	1,165
State and municipal obligations | Fair Value, Inputs, Level 2 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		66,519
State and municipal obligations | Fair Value, Inputs, Level 2 | Long-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term investments		10,611
Certificates of deposit | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		500
Fair Value		500
Certificates of deposit | Fair Value, Inputs, Level 2 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		500
Corporate bonds | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		212,825
Amortized Cost	32,748
Gross Unrealized Gains		232
Gross Unrealized Gains	1
Gross Unrealized Losses		(100)
Gross Unrealized Losses	(276)
Fair Value		212,957
Fair Value	32,473
Cash and Cash Equivalents		2,525
Short-term investments	2,406
Long-term investments	$ 30,067
Corporate bonds | Fair Value, Inputs, Level 2 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		170,205
Corporate bonds | Fair Value, Inputs, Level 2 | Long-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Long-term investments		40,095
U.S. Treasury repurchase agreements | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		13,200
Fair Value		13,200
Cash and Cash Equivalents		13,200
Treasury inflation - protected securities | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		3,291
Gross Unrealized Gains		16
Fair Value		3,307
Treasury inflation - protected securities | Fair Value, Inputs, Level 2 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		3,291
Commercial paper | Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost		45,974
Fair Value		45,974
Commercial paper | Fair Value, Inputs, Level 2 | Short-Term Investments
Restricted Cash and Cash Equivalents Items [Line Items]
Short-term investments		$ 45,974