CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Treasury Stock	Accumulated  Other Comprehensive Income
BEGINNING BALANCE (in shares) at Dec. 31, 2021		33,271,659
BEGINNING BALANCE at Dec. 31, 2021	$ 416,840	$ 333	$ 211,430	$ 352,543		$ (227)
BEGINING BALANCE, Treasury Stock (in shares) at Dec. 31, 2021					(3,565,258)
BEGINING BALANCE, Treasury Stock at Dec. 31, 2021					$ (147,239)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	154,704			154,704
Issuance of common stock awards to employees (in shares)		112,389
Issuance of common stock awards to employees	0	$ 1	(1)
Surrender of common stock awards (in shares)					(53,599)
Surrender of common stock awards	(4,464)				$ (4,464)
Share-based compensation expense	9,559		9,559
Share-based compensation issued to directors (in shares)		6,305
Share-based compensation issued to directors	389		389
Issuance of awards previously classified as liability awards (in shares)		39,204
Issuance of awards previously classified as liability awards	4,000		4,000
Dividends declared	(53,961)			(53,961)
Common stock repurchase (in shares)					(1,206,602)
Common stock repurchase	(112,193)				$ (112,193)
Other comprehensive income, net of tax	42,640					42,640
ENDING BALANCE (in shares) at Sep. 30, 2022		33,429,557
ENDING BALANCE at Sep. 30, 2022	457,514	$ 334	225,377	453,286		42,413
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2022					(4,825,459)
ENDING BALANCE, Treasury Stock at Sep. 30, 2022					$ (263,896)
BEGINNING BALANCE (in shares) at Jun. 30, 2022		33,428,587
BEGINNING BALANCE at Jun. 30, 2022	400,601	$ 334	222,270	401,326		28,034
BEGINING BALANCE, Treasury Stock (in shares) at Jun. 30, 2022					(4,682,973)
BEGINING BALANCE, Treasury Stock at Jun. 30, 2022					$ (251,363)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	60,978			60,978
Surrender of common stock awards (in shares)					(554)
Surrender of common stock awards	(5)				$ (5)
Share-based compensation expense	2,967		2,967
Share-based compensation issued to directors (in shares)		970
Share-based compensation issued to directors	140		140
Dividends declared	$ (9,018)			(9,018)
Common stock repurchase (in shares)	(142,000)				(141,932)
Common stock repurchase	$ (12,528)				$ (12,528)
Other comprehensive income, net of tax	14,379					14,379
ENDING BALANCE (in shares) at Sep. 30, 2022		33,429,557
ENDING BALANCE at Sep. 30, 2022	$ 457,514	$ 334	225,377	453,286		42,413
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2022					(4,825,459)
ENDING BALANCE, Treasury Stock at Sep. 30, 2022					$ (263,896)
BEGINNING BALANCE (in shares) at Dec. 31, 2022	33,429,557	33,429,557
BEGINNING BALANCE at Dec. 31, 2022	$ 493,499	$ 334	228,827	513,095		40,560
BEGINING BALANCE, Treasury Stock (in shares) at Dec. 31, 2022	(5,123,075)				(5,123,075)
BEGINING BALANCE, Treasury Stock at Dec. 31, 2022	$ (289,317)				$ (289,317)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	178,863			178,863
Issuance of common stock awards to employees (in shares)		146,354
Issuance of common stock awards to employees	0	$ 2	(2)
Surrender of common stock awards (in shares)					(49,719)
Surrender of common stock awards	(5,827)				$ (5,827)
Share-based compensation expense	10,236		10,236
Share-based compensation issued to directors (in shares)		6,538
Share-based compensation issued to directors	485		485
Dividends declared	$ (53,649)			(53,649)
Common stock repurchase (in shares)	(1,200,000)
Common stock repurchase	$ (112,200)
Other comprehensive income, net of tax	$ 4,575					4,575
ENDING BALANCE (in shares) at Sep. 30, 2023	33,582,449	33,582,449
ENDING BALANCE at Sep. 30, 2023	$ 628,182	$ 336	239,546	638,309		45,135
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2023	(5,172,794)				(5,172,794)
ENDING BALANCE, Treasury Stock at Sep. 30, 2023	$ (295,144)				$ (295,144)
BEGINNING BALANCE (in shares) at Jun. 30, 2023		33,582,403
BEGINNING BALANCE at Jun. 30, 2023	560,672	$ 336	236,123	579,691		39,653
BEGINING BALANCE, Treasury Stock (in shares) at Jun. 30, 2023					(5,171,835)
BEGINING BALANCE, Treasury Stock at Jun. 30, 2023					$ (295,131)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	67,992			67,992
Issuance of common stock awards to employees (in shares)		46
Surrender of common stock awards (in shares)					(959)
Surrender of common stock awards	(13)				$ (13)
Share-based compensation expense	3,246		3,246
Share-based compensation issued to directors	177		177
Dividends declared	(9,374)			(9,374)
Other comprehensive income, net of tax	$ 5,482					5,482
ENDING BALANCE (in shares) at Sep. 30, 2023	33,582,449	33,582,449
ENDING BALANCE at Sep. 30, 2023	$ 628,182	$ 336	$ 239,546	$ 638,309		$ 45,135
ENDING BALANCE, Treasury Stock (in shares) at Sep. 30, 2023	(5,172,794)				(5,172,794)
ENDING BALANCE, Treasury Stock at Sep. 30, 2023	$ (295,144)				$ (295,144)