Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Class A [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Total
Balance at beginning of period at Dec. 31, 2023	$ 91	$ 621,853	$ (1,570,440)	$ (100,006)	$ 1,870,470	$ 821,968
Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	(118,791)	(118,791)
Other comprehensive income (loss), net of tax	0	0	0	(16,989)	0	(16,989)
Exercise of employee stock options/vesting of stock awards	0	(8,301)	6,350	0	0	(1,951)
Stock-based compensation	0	7,888	0	0	0	7,888
Cash dividends	0	0	0	0	(5,961)	(5,961)
Balance at end of period at Jun. 30, 2024	91	621,440	(1,564,090)	(116,995)	1,745,718	686,164
Balance at beginning of period at Mar. 31, 2024	91	618,706	(1,564,942)	(110,607)	1,866,958	810,206
Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	(118,258)	(118,258)
Other comprehensive income (loss), net of tax	0	0	0	(6,388)	0	(6,388)
Exercise of employee stock options/vesting of stock awards	0	(912)	852	0	0	(60)
Stock-based compensation	0	3,646	0	0	0	3,646
Cash dividends	0	0	0	0	(2,982)	(2,982)
Balance at end of period at Jun. 30, 2024	91	621,440	(1,564,090)	(116,995)	1,745,718	686,164
Balance at beginning of period at Dec. 31, 2024	91	627,787	(1,563,614)	(124,758)	1,711,949	651,455
Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	128,634	128,634
Other comprehensive income (loss), net of tax	0	0	0	10,700	0	10,700
Repurchase of Class A common stock (Note 7)	0	0	(5,012)	0	0	(5,012)
Exercise of employee stock options/vesting of stock awards	0	(9,357)	8,215	0	0	(1,142)
Stock-based compensation	0	9,085	0	0	0	9,085
Cash dividends	0	0	0	0	(5,966)	(5,966)
Balance at end of period at Jun. 30, 2025	91	627,515	(1,560,411)	(114,058)	1,834,617	787,754
Balance at beginning of period at Mar. 31, 2025	91	623,477	(1,562,211)	(123,850)	1,816,462	753,969
Stockholders' Equity [Roll Forward]
Net income (loss)	0	0	0	0	21,119	21,119
Other comprehensive income (loss), net of tax	0	0	0	9,792	0	9,792
Exercise of employee stock options/vesting of stock awards	0	(1,780)	1,800	0	0	20
Stock-based compensation	0	5,818	0	0	0	5,818
Cash dividends	0	0	0	0	(2,964)	(2,964)
Balance at end of period at Jun. 30, 2025	$ 91	$ 627,515	$ (1,560,411)	$ (114,058)	$ 1,834,617	$ 787,754