Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Retained Earnings [Member]	Total
Shares, Outstanding, Beginning Balance at Dec. 31, 2020	77,284	22,430
Total equity, beginning of period at Dec. 31, 2020	$ 77	$ 22	$ 457,161	$ 3,955	$ 1,045,082	$ 1,506,297
Stock-based compensation			7,883			7,883
Grant of restricted stock units			163			163
Exercise of stock options (shares)	303
Exercise of stock options	$ 1		9,100			9,101
Comprehensive income/(loss)				(5,779)	45,329	39,550
Total equity, end of period at Mar. 31, 2021	$ 78	$ 22	474,307	(1,824)	1,090,411	1,562,994
Shares, Outstanding, Ending Balance at Mar. 31, 2021	77,587	22,430
Shares, Outstanding, Beginning Balance at Dec. 31, 2020	77,284	22,430
Total equity, beginning of period at Dec. 31, 2020	$ 77	$ 22	457,161	3,955	1,045,082	1,506,297
Comprehensive income/(loss)						81,347
Total equity, end of period at Jun. 30, 2021	$ 79	$ 22	508,788	(1,572)	1,131,956	1,639,273
Shares, Outstanding, Ending Balance at Jun. 30, 2021	78,303	22,430
Shares, Outstanding, Beginning Balance at Mar. 31, 2021	77,587	22,430
Total equity, beginning of period at Mar. 31, 2021	$ 78	$ 22	474,307	(1,824)	1,090,411	1,562,994
Stock-based compensation			7,788			7,788
Grant of restricted stock units			197			197
Exercise of stock options (shares)	716
Exercise of stock options	$ 1		26,496			26,497
Comprehensive income/(loss)				252	41,545	41,797
Total equity, end of period at Jun. 30, 2021	$ 79	$ 22	508,788	(1,572)	1,131,956	1,639,273
Shares, Outstanding, Ending Balance at Jun. 30, 2021	78,303	22,430
Shares, Outstanding, Beginning Balance at Dec. 31, 2021	79,114	22,430
Total equity, beginning of period at Dec. 31, 2021	$ 79	$ 22	553,787	(6,772)	1,194,272	1,741,388
Stock-based compensation			8,353			8,353
Grant of restricted stock units			196			196
Exercise of stock options (shares)	184
Exercise of stock options			7,746			7,746
Comprehensive income/(loss)				(10,395)	38,084	27,689
Total equity, end of period at Mar. 31, 2022	$ 79	$ 22	570,082	(17,167)	1,232,356	1,785,372
Shares, Outstanding, Ending Balance at Mar. 31, 2022	79,298	22,430
Shares, Outstanding, Beginning Balance at Dec. 31, 2021	79,114	22,430
Total equity, beginning of period at Dec. 31, 2021	$ 79	$ 22	553,787	(6,772)	1,194,272	$ 1,741,388
Exercise of stock options (shares)						274
Comprehensive income/(loss)						$ 74,078
Total equity, end of period at Jun. 30, 2022	$ 77	$ 22	581,907	(25,368)	1,142,455	1,699,093
Shares, Outstanding, Ending Balance at Jun. 30, 2022	77,037	22,430
Shares, Outstanding, Beginning Balance at Mar. 31, 2022	79,298	22,430
Total equity, beginning of period at Mar. 31, 2022	$ 79	$ 22	570,082	(17,167)	1,232,356	1,785,372
Stock-based compensation			8,020			8,020
Grant of restricted stock units			220			220
Exercise of stock options (shares)	90
Exercise of stock options			3,585			3,585
Comprehensive income/(loss)				(8,201)	54,590	46,389
Repurchase and retirement of common stock (shares)	(2,351)
Repurchase and retirement of common stock	$ (2)				(144,491)	(144,493)
Total equity, end of period at Jun. 30, 2022	$ 77	$ 22	$ 581,907	$ (25,368)	$ 1,142,455	$ 1,699,093
Shares, Outstanding, Ending Balance at Jun. 30, 2022	77,037	22,430