CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	AOCI Attributable to Parent	Total
Balance at Dec. 31, 2022	$ 16,796	$ 370,712	$ 450,114	$ (64,898)	$ 772,724
Net income			27,157		27,157
Other comprehensive income (loss), net of tax				9,325	9,325
Common cash dividends declared			(1,010)		(1,010)
Repurchase and cancellation of shares of common stock as a result of a share repurchase program	(153)	(3,356)	(4,210)		(7,719)
Stock-based compensation expense		953			953
Issuance of common stock under employee benefit plans	71	(7)			64
Balance at Mar. 31, 2023	16,714	368,302	472,051	(55,573)	801,494
Balance at Dec. 31, 2022	16,796	370,712	450,114	(64,898)	772,724
Net income					80,703
Other comprehensive income (loss), net of tax					(16,426)
Balance at Sep. 30, 2023	16,732	369,833	523,142	(81,324)	828,383
Balance at Mar. 31, 2023	16,714	368,302	472,051	(55,573)	801,494
Net income			28,425		28,425
Other comprehensive income (loss), net of tax				(6,336)	(6,336)
Common cash dividends declared			(1,003)		(1,003)
Repurchase and cancellation of shares of common stock as a result of a share repurchase program	(23)	(495)	(449)		(967)
Stock-based compensation expense		673			673
Issuance of common stock under employee benefit plans	23	380			403
Balance at Jun. 30, 2023	16,714	368,860	499,024	(61,909)	822,689
Net income			25,121		25,121
Other comprehensive income (loss), net of tax				(19,415)	(19,415)
Common cash dividends declared			(1,003)		(1,003)
Stock-based compensation expense		527			527
Issuance of common stock under employee benefit plans	18	446			464
Balance at Sep. 30, 2023	16,732	369,833	523,142	(81,324)	828,383
Balance at Dec. 31, 2023	16,749	370,814	554,992	(55,959)	886,596
Net income			26,726		26,726
Other comprehensive income (loss), net of tax				(5,373)	(5,373)
Common cash dividends declared			(1,008)		(1,008)
Stock-based compensation expense		941			941
Issuance of common stock under employee benefit plans	58	(598)			(540)
Balance at Mar. 31, 2024	16,807	371,157	580,710	(61,332)	907,342
Balance at Dec. 31, 2023	16,749	370,814	554,992	(55,959)	886,596
Net income					83,625
Other comprehensive income (loss), net of tax					6,317
Balance at Sep. 30, 2024	16,861	373,812	635,589	(49,642)	976,620
Balance at Mar. 31, 2024	16,807	371,157	580,710	(61,332)	907,342
Net income			29,114		29,114
Other comprehensive income (loss), net of tax				(368)	(368)
Common cash dividends declared			(1,008)		(1,008)
Stock-based compensation expense		696			696
Issuance of common stock under employee benefit plans	18	525			543
Balance at Jun. 30, 2024	16,825	372,378	608,816	(61,700)	936,319
Net income			27,785		27,785
Other comprehensive income (loss), net of tax				12,058	12,058
Common cash dividends declared			(1,012)		(1,012)
Stock-based compensation expense		235			235
Issuance of common stock under employee benefit plans	36	1,199			1,235
Balance at Sep. 30, 2024	$ 16,861	$ 373,812	$ 635,589	$ (49,642)	$ 976,620