Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Redeemable Noncontrolling Interests in Consolidated Entities/Temporary Stockholders' Equity [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]
Balance, beginning of period at Dec. 31, 2019		$ 412		$ 1,593,281	$ 58,798
Cumulative effect from the adoption of new accounting standards, net at Dec. 31, 2019							$ (1,240)
Repurchases of common stock		(22)	$ (29,076)	(208,073)
Share-based compensation			29,079
Net issuance of common stock		3	(3)
Net income	$ 386,164			386,164
Dividends				(64,346)
Change in foreign currency translation adjustment, net of income tax expense (benefit)					7,343
Change in net unrealized investment gains (losses)during the period, net of income taxes:					63,565
Balance, end of period at Dec. 31, 2020	$ 1,835,885	393		1,705,786	129,706
Dividends declared per share	$ 1.60
Repurchases of common stock		(1)	(25,817)
Share-based compensation			31,043
Net issuance of common stock		2	(2)
Net income	$ 373,357			373,357
Dividends				(74,637)
Change in foreign currency translation adjustment, net of income tax expense (benefit)					7,033
Acquisition of noncontrolling interest						$ 8,438
Net income (loss) attributable to noncontrolling interests	(1,377)					(1,377)
Changes in noncontrolling interests in consolidated entities, net						210
Change in net unrealized investment gains (losses)during the period, net of income taxes:					(64,351)
Balance, end of period at Dec. 31, 2021	$ 2,082,512	394	5,224	2,004,506	72,388	7,271
Dividends declared per share	$ 1.88
Cumulative effect from the adoption of new accounting standards, net at Dec. 31, 2021	$ 2,004,506
Repurchases of common stock		(28)	(41,079)	(320,332)
Redemption of noncontrolling interest in consolidated entities			2,233			(2,233)
Share-based compensation			33,624
Net issuance of common stock		2	$ (2)
Net income	373,012			373,012
Dividends				(83,783)
Change in foreign currency translation adjustment, net of income tax expense (benefit)					(20,015)
Net income (loss) attributable to noncontrolling interests	(5,038)					$ (5,038)
Change in net unrealized investment gains (losses)during the period, net of income taxes:					(304,645)
Balance, end of period at Dec. 31, 2022	$ 1,721,499	$ 368		$ 1,973,403	$ 252,272
Dividends declared per share	$ 2.20