CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2020		55,243,000
Beginning balance at Dec. 31, 2020	$ 1,130,402	$ 5,524	$ 856,092	$ 256,701	$ (8,285)	$ 20,370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	72,972			88,073		(15,101)
Stock based compensation (in shares)		23,000
Stock based compensation expense	6,620		6,620
Common stock transactions related to stock based employee benefit plans (in shares)		139,000
Common stock transactions related to stock based employee benefit plans	(1,884)	$ 17	(40)		(1,861)
Common stock issued for stock options (in shares)		257,000
Common stock issued for stock options	5,172	$ 25	5,147
Issuance of common stock, pursuant to acquisition (in shares)		2,687,000
Issuance of common stock, pursuant to acquisition	86,487	$ 269	86,218
Conversion of options, pursuant to acquisition	5,607		5,607
Dividends on common stock	(14,856)			(14,856)
Increase (decrease) in shares during period (in shares)		3,106,000
Increase (decrease) in stockholders' equity during period	160,118	$ 311	103,552	73,217	(1,861)	(15,101)
Ending balance (in shares) at Sep. 30, 2021		58,349,000
Ending balance at Sep. 30, 2021	1,290,520	$ 5,835	959,644	329,918	(10,146)	5,269
Beginning balance (in shares) at Jun. 30, 2021		55,436,000
Beginning balance at Jun. 30, 2021	1,182,347	$ 5,544	862,598	314,584	(10,180)	9,801
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	18,412			22,944		(4,532)
Stock based compensation (in shares)		23,000
Stock based compensation expense	2,358		2,358
Common stock transactions related to stock based employee benefit plans (in shares)		25,000
Common stock transactions related to stock based employee benefit plans	17	$ 5	(22)		34
Common stock issued for stock options (in shares)		178,000
Common stock issued for stock options	2,902	$ 17	2,885
Issuance of common stock, pursuant to acquisition (in shares)		2,687,000
Issuance of common stock, pursuant to acquisition	86,487	$ 269	86,218
Conversion of options, pursuant to acquisition	5,607		5,607
Dividends on common stock	(7,610)			(7,610)
Increase (decrease) in shares during period (in shares)		2,913,000
Increase (decrease) in stockholders' equity during period	108,173	$ 291	97,046	15,334	34	(4,532)
Ending balance (in shares) at Sep. 30, 2021		58,349,000
Ending balance at Sep. 30, 2021	$ 1,290,520	$ 5,835	959,644	329,918	(10,146)	5,269
Beginning balance (in shares) at Dec. 31, 2021	58,504,250	58,504,000
Beginning balance at Dec. 31, 2021	$ 1,310,736	$ 5,850	963,851	358,598	(10,569)	(6,994)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(97,640)			82,580		(180,220)
Stock based compensation (in shares)		21,000
Stock based compensation expense	6,620		6,620
Common stock transactions related to stock based employee benefit plans (in shares)		183,000
Common stock transactions related to stock based employee benefit plans	(1,018)	$ 21	(69)		(970)
Common stock issued for stock options (in shares)		218,000
Common stock issued for stock options	4,049	$ 22	4,027
Issuance of common stock, pursuant to acquisition (in shares)		2,550,000
Issuance of common stock, pursuant to acquisition	90,234	$ 255	89,979
Conversion of options, pursuant to acquisition	3,833		3,833
Dividends on common stock	(29,012)			(29,012)
Increase (decrease) in shares during period (in shares)		2,972,000
Increase (decrease) in stockholders' equity during period	$ (22,934)	$ 298	104,390	53,568	(970)	(180,220)
Ending balance (in shares) at Sep. 30, 2022	61,476,328	61,476,000
Ending balance at Sep. 30, 2022	$ 1,287,802	$ 6,148	1,068,241	412,166	(11,539)	(187,214)
Beginning balance (in shares) at Jun. 30, 2022		61,410,000
Beginning balance at Jun. 30, 2022	1,329,575	$ 6,141	1,065,167	393,431	(11,632)	(123,532)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	(34,445)			29,237		(63,682)
Stock based compensation (in shares)		21,000
Stock based compensation expense	2,504		2,504
Common stock transactions related to stock based employee benefit plans (in shares)		7,000
Common stock transactions related to stock based employee benefit plans	63	$ 3	(33)		93
Common stock issued for stock options (in shares)		38,000
Common stock issued for stock options	607	$ 4	603
Dividends on common stock	(10,502)			(10,502)
Increase (decrease) in shares during period (in shares)		66,000
Increase (decrease) in stockholders' equity during period	$ (71,015)	$ 7	3,074	18,735	93	(63,682)
Ending balance (in shares) at Sep. 30, 2022	61,476,328	61,476,000
Ending balance at Sep. 30, 2022	$ 1,287,802	$ 6,148	$ 1,068,241	$ 412,166	$ (11,539)	$ (187,214)