Consolidated Statements of Stockholders' Equity - USD ($)		Total		Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Deferred Compensation [Member]	Treasury Stock [Member]
Shares, Issued	[1],[2]			16,403,776
Stockholders' Equity Attributable to Parent		$ 561,577,000	[2]	$ 7,984,000	$ 259,253,000	$ 300,607,000	$ (6,267,000)	$ 4,543,000	$ (4,543,000)
Net Income		71,498,000				71,498,000
Other comprehensive loss		3,402,000					3,402,000
Dividends		(29,106,000)				(29,106,000)
Stock Issued, Value, During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan				$ 498,000
Stock Issued During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan				1,023,609
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		85,851,000			85,353,000
Share-based compensation, shares				34,456
Share-based compensation		3,893,000	[3],[4]	$ 17,000	3,876,000
Treasury stock activities		0						1,136,000	(1,136,000)
New Accounting Pronouncement of Change in Accounting Principle, Effect of Adoption		30,000				30,000
Shares, Issued	[1],[2]			17,461,841
Stockholders' Equity Attributable to Parent		697,085,000	[2]	$ 8,499,000	348,482,000	342,969,000	(2,865,000)	5,679,000	(5,679,000)
Net Income		83,466,000				83,466,000
Other comprehensive loss		4,168,000					4,168,000
Dividends		(33,363,000)				(33,363,000)
Stock Issued, Value, During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan				$ 72,000	18,176,000
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		18,248,000
Share-based compensation, shares	[3],[4]			46,313
Share-based compensation		$ 4,526,000	[3],[4]	$ 22,000	4,504,000
Treasury stock activities								1,561,000	(1,561,000)
Stock Issued During Period, Shares, Dividend Reinvestment Plan		100,000		147,256
Stock Issued During Period, Value, Dividend Reinvestment Plan		$ 125.71
Shares, Issued	[1],[2]			17,655,410
Stockholders' Equity Attributable to Parent		774,130,000		$ 8,593,000	371,162,000	393,072,000	1,303,000	7,240,000	(7,240,000)
Net Income		89,796,000
Other comprehensive loss		(2,682,000)					(2,682,000)
Dividends		(37,359,000)				(37,359,000)
Stock Issued, Value, During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan		5,292,000		$ 19,000	5,273,000
Stock Issued During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan				39,418
Share-based compensation, shares	[3],[4]			46,590
Share-based compensation		$ 3,624,000	[3],[4]	$ 23,000	3,601,000
Treasury stock activities								(180,000)	180,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan		100,000
Stock Issued During Period, Value, Dividend Reinvestment Plan		$ 136.26
Shares, Issued	[1],[2]			17,741,418
Stockholders' Equity Attributable to Parent		$ 832,801,000		$ 8,635,000	$ 380,036,000	$ 445,509,000	$ (1,379,000)	$ 7,060,000	$ (7,060,000)

[1] 2,000,000 shares of preferred stock at $0.01 par value per share have been authorized. No shares have been issued or are outstanding; accordingly, no information has been included in the Consolidated Statements of Stockholders’ Equity.

[2] Includes 108,143, 116,238 and 105,087 shares at December 31, 2022, 2021 and 2020, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan

[3] Includes amounts for shares issued for directors’ compensation.

[4] The shares issued under the SICP are net of shares withheld for employee taxes. For 2022, 2021 and 2020, we withheld 21,832, 14,020 and 10,319 shares, respectively, for taxes.(5) Includes shares issued under the Retirement Savings Plan, DRIP and/or ATM equity issuances, as applicable.