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Investments (Detail) $ in Thousands, € in Millions, $ in Millions	1 Months Ended			12 Months Ended				36 Months Ended
	Oct. 31, 2019 USD ($) shares	Oct. 31, 2019 AUD ($) shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2021 AUD ($)	Oct. 31, 2021 USD ($)	Oct. 31, 2021 AUD ($)	Dec. 31, 2020 AUD ($)	Dec. 31, 2019 AUD ($)	Dec. 31, 2019 EUR (€)	Oct. 31, 2019 AUD ($)	Dec. 31, 2018 AUD ($)
Debt Securities, Available-for-sale [Line Items]
Other than temporary impairment of available for sale debt security					$ 4,900
Conversion of available-for-sale debt security into other equity security				$ 0	0		$ 791
Change in fair value of other equity securities				$ 1,812	$ 0		0
Mylo | Nonvoting Common Stock Class C
Debt Securities, Available-for-sale [Line Items]
Shares purchased | shares			3,000,000
Value of shares purchased			$ 3,000
LegalZoom | LawPath
Debt Securities, Available-for-sale [Line Items]
Equity interest				14.00%	14.00%				14.00%			14.00%
LegalZoom | Mylo
Debt Securities, Available-for-sale [Line Items]
Equity interest				4.00%					4.00%
Legal Vision
Debt Securities, Available-for-sale [Line Items]
Convertible promissory note							$ 700	$ 700					$ 1.0
Convertible promissory note, term							10 years
Fair value of available for sale debt security				$ 1,100	$ 1,000				$ 1.5			$ 1.4
Legal Vision | Expected term
Debt Securities, Available-for-sale [Line Items]
Measurement Input				7.3					7.3
Legal Vision | Risk-free rate
Debt Securities, Available-for-sale [Line Items]
Measurement Input				0.015					0.015
Legal Vision | Volatility
Debt Securities, Available-for-sale [Line Items]
Measurement Input				0.55					0.55
Firma
Debt Securities, Available-for-sale [Line Items]
Convertible promissory note, term								5 years
Revenue target | €														€ 5.0
Other than temporary impairment of available for sale debt security					$ 4,800	€ 4.3
LawPath
Debt Securities, Available-for-sale [Line Items]
Convertible promissory note			$ 800													$ 1.1
Other equity securities	$ 700									$ 1,100	$ 1.5				$ 1.0
Conversion of available-for-sale debt security into other equity security	$ 800	$ 1.2
Shares converted | shares	4,215	4,215

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