CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Preferred Stock Series A Nonconvertible Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
BALANCE at Dec. 31, 2023	$ 1,447,226	$ 2	$ 487	$ 699,554	$ 789,553	$ (1,086)	$ (41,284)
BALANCE (in shares) at Dec. 31, 2023		200,000	48,731,026
Treasury Stock Common Shares Beginning at Dec. 31, 2023							1,365,648
Net income	56,853				56,853
Other comprehensive income	(2,708)					(2,708)
Cash dividends declared	(19,527)				(19,527)
Stock-based compensation and ESPP activity, net of taxes withheld	3,056		$ 1	3,055
Shares withheld for tax withholding obligations (in shares)			73,938
Treasury Stock Common Shares Ending at Mar. 31, 2024							1,365,648
BALANCE at Mar. 31, 2024	1,484,900	$ 2	$ 488	702,609	826,879	(3,794)	$ (41,284)
BALANCE (in shares) at Mar. 31, 2024		200,000	48,804,964
BALANCE at Dec. 31, 2024	1,616,525	$ 2	$ 488	723,719	934,655	(1,055)	$ (41,284)
BALANCE (in shares) at Dec. 31, 2024		200,000	48,834,541
Treasury Stock Common Shares Beginning at Dec. 31, 2024							1,365,648
Net income	64,444				64,444
Other comprehensive income	1,349					1,349
Cash dividends declared	(21,543)				(21,543)
Stock-based compensation and ESPP activity, net of taxes withheld	1,443		$ 1	1,444
Shares withheld for tax withholding obligations (in shares)			102,883
Treasury Stock Common Shares Ending at Mar. 31, 2025							1,365,648
BALANCE at Mar. 31, 2025	$ 1,659,332	$ 2	$ 489	$ 722,275	$ 977,556	$ 294	$ (41,284)
BALANCE (in shares) at Mar. 31, 2025		200,000	48,937,424