Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands		Total		Common Stock [Member]		Additional Paid-In Capital [Member]		Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Deferred Compensation [Member]	Treasury Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		116,238
Common Stock, Dividends, Per Share, Declared		$ 0.4800
Beginning Balances (shares) at Dec. 31, 2021	[1],[2]			17,655,410
Beginning Balances at Dec. 31, 2021		$ 774,130	[1],[2]	$ 8,593	[1],[2]	$ 371,162		$ 393,072	$ 1,303	$ 7,240	$ (7,240)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		36,933						36,933
Other comprehensive income (loss)		547							547
Other Comprehensive Income (Loss), Net of Tax		547
Dividend declared		(8,661)						(8,661)
Retirement savings plan and dividend reinvestment plan (shares)				24,960
Dividend reinvestment plan		3,422		$ 12		3,410
Share-based compensation (shares)	[3],[4]			39,018
Share-based compensation and tax benefit		(859)		$ 19	[3],[4]	(878)	[3],[4]
Treasury stock activities		0								(763)	763
Ending Balances (shares) at Mar. 31, 2022	[1]			17,719,388
Ending Balances at Mar. 31, 2022		$ 805,512	[1]	$ 8,624	[1]	373,694		421,344	1,850	6,477	(6,477)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		21,832
Shares Held In Trust For Deferred Compensation Plan		107,518
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Shares Held In Trust For Deferred Compensation Plan		108,143
Common Stock, Dividends, Per Share, Declared		$ 0.5350
Beginning Balances (shares) at Dec. 31, 2022	[1],[2]			17,741,418
Beginning Balances at Dec. 31, 2022		$ 832,801		$ 8,635	[1],[2]	380,036		445,509	(1,379)	7,060	(7,060)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		36,344						36,344
Other comprehensive income (loss)		(604)							(604)
Other Comprehensive Income (Loss), Net of Tax		(604)
Dividend declared		(9,644)						(9,644)
Retirement savings plan and dividend reinvestment plan (shares)				0
Dividend reinvestment plan		(11)		$ 0		(11)
Share-based compensation (shares)	[3],[4]			48,438
Share-based compensation and tax benefit	[3],[4]	(298)		$ 24		(322)
Treasury stock activities								0		1,756	(1,756)
Ending Balances (shares) at Mar. 31, 2023	[1]			17,789,856
Ending Balances at Mar. 31, 2023		$ 858,588	[1]	$ 8,659	[1]	$ 379,703		$ 472,209	$ (1,983)	$ 8,816	$ (8,816)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		19,859
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Shares Held In Trust For Deferred Compensation Plan		109,687

[1] 2,000,000 shares of preferred stock at $0.01 par value have been authorized. No shares have been issued or are outstanding; accordingly, no information has been included in the statements of stockholders’ equity.    

[2] Includes 109,687, 108,143, 107,518, and 116,238 shares at March 31, 2023, December 31, 2022, March 31, 2022 and December 31, 2021, 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 the three months ended March 31, 2023 and 2022, we withheld 19,859 and 21,832 shares, respectively, for employee taxes.(5)Can include shares issued under the Retirement Savings Plan, DRIP and ATM equity issuances.