Changes in Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance, Amount	$ 992,224
Other comprehensive gain before reclassifications	5,134
Ending Balance, Amount	1,046,379
Cumulative Translation Adjustment [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance, Amount	(3,070)
Other comprehensive gain before reclassifications	627
Ending Balance, Amount	(2,443)
Unrealized Loss on Investments [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance, Amount	(9,820)
Other comprehensive gain before reclassifications	4,507
Ending Balance, Amount	(5,313)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance, Amount	(12,890)
Ending Balance, Amount	$ (7,756)