Accumulated Other Comprehensive (Loss) Income - Summary of Changes in Accumulated Other Comprehensive (Loss) Income, Net of Tax, from Unrealized Gains (Losses) on Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Value	$ 249,001	$ 186,713	$ 133,630
Amount reclassified from accumulated other comprehensive (Loss) income	(39)	(272)
Net current period other comprehensive (loss) income	(431)	(97)	284
Balance, Value	227,522	249,001	186,713
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Value	73	170	(114)
Other comprehensive (loss) income before reclassifications	(392)	175	284
Amount reclassified from accumulated other comprehensive (Loss) income	(39)	(272)
Net current period other comprehensive (loss) income	(431)	(97)	284
Balance, Value	$ (358)	$ 73	$ 170

Accumulated Other Comprehensive (Loss) Income - Summary of Changes in Accumulated Other Comprehensive (Loss) Income, Net of Tax, from Unrealized Gains (Losses) on Available-for-Sale Marketable Securities (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2019

Accumulated Other Comprehensive Income Loss [Line Items]

Balance, Value

$ 249,001

$ 186,713

$ 133,630

Amount reclassified from accumulated other comprehensive (Loss) income

(39)

(272)

Net current period other comprehensive (loss) income

(431)

(97)

284

Balance, Value

227,522

249,001

186,713

Accumulated Other Comprehensive (Loss) Income

Accumulated Other Comprehensive Income Loss [Line Items]

Balance, Value

170

(114)

Other comprehensive (loss) income before reclassifications

(392)

175

284

Amount reclassified from accumulated other comprehensive (Loss) income

(39)

(272)

Net current period other comprehensive (loss) income

(431)

(97)

284

Balance, Value

$ (358)

$ 73

$ 170

- Definition

Amount after tax and reclassification adjustments of other comprehensive income (loss).

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+ Details

- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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