Schedule I - Condensed Statements of Cash Flows (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities:
Net income/loss	$ 256,513	$ (312,321)	$ 89,476
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Equity in net (income) loss of subsidiary	(256,513)	312,321	(89,476)
Net cash provided by (used in) operating activities	503,012	(120,729)	348,416
Cash Flows From Investing Activities:
Net cash used in investing activities	(128,854)	(109,175)	(195,193)
Cash Flows From Financing Activities:
Exercise of stock options	5,907	2,920	3,795
Net cash (used in) provided by financing activities	(364,897)	624,204	(147,305)
Change in Cash and Cash Equivalents, including Restricted Cash	9,261	394,300	5,918
Cash and Cash Equivalents, including Restricted Cash—Beginning of year	435,225	40,925	35,007
Cash and Cash Equivalents, including Restricted Cash—End of year	444,486	435,225	40,925
Parent Company [Member]
Cash Flows From Operating Activities:
Net income/loss	256,513	(312,321)	89,476
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Equity in net (income) loss of subsidiary	(256,513)	312,321	(89,476)
Cash Flows From Investing Activities:
Dividends forfeited from subsidiary- return of capital, net of forfeitures		(1)	(5)
Capital contributed to subsidiary from exercises of stock options	(5,955)	(2,621)	(3,696)
Net cash used in investing activities	(5,955)	(2,622)	(3,701)
Cash Flows From Financing Activities:
Exercise of stock options	5,907	2,920	3,795
Dividends paid to common stockholders		(12)	(61)
Net cash (used in) provided by financing activities	5,907	2,908	3,734
Change in Cash and Cash Equivalents, including Restricted Cash	(48)	286	33
Cash and Cash Equivalents, including Restricted Cash—Beginning of year	455	169	136
Cash and Cash Equivalents, including Restricted Cash—End of year	407	455	169
Supplemental Disclosures of Noncash Financing Activities
Dividends from subsidiary- return of capital, for purchase of treasury stock	215,749	12,406	150,000
Parent Company [Member] | Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Cash Flows From Operating Activities:
Net income/loss	256,513	(312,321)	89,476
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Equity in net (income) loss of subsidiary	$ (256,513)	$ 312,321	$ (89,476)