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, Preferred	Treasury Stock, Common
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		116,238
Common Stock, Dividends, Per Share, Declared		$ 1.015
Beginning Balances (shares) at Dec. 31, 2021				17,655,410
Beginning Balances at Dec. 31, 2021		$ 774,130		$ 8,593		$ 371,162	$ 393,072	$ 1,303	$ 7,240		$ (7,240)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		53,985					53,985
Other comprehensive income (loss)		67						67
Other Comprehensive Income (Loss), Net of Tax		67
Dividend declared		(18,224)					(18,224)
Retirement savings plan and dividend reinvestment plan (shares)				33,846
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan				$ 17		4,613
Share-based compensation (shares)				45,538
Share-based compensation and tax benefit		4,630		$ 22		1,091
Treasury stock activities		1,113					0		(222)		222
Ending Balances (shares) at Jun. 30, 2022	[1]			17,734,794
Ending Balances at Jun. 30, 2022		$ 815,701	[1]	$ 8,632	[1]	376,866	428,833	1,370	7,018		(7,018)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		21,832
Common Stock, Dividends, Per Share, Declared		$ 0.5350
Beginning Balances (shares) at Mar. 31, 2022				17,719,388
Beginning Balances at Mar. 31, 2022		$ 805,512		$ 8,624		373,694	421,344	1,850	6,477	$ (6,477)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		17,051					17,051
Other comprehensive income (loss)		(480)						(480)
Other Comprehensive Income (Loss), Net of Tax		(480)
Dividend declared		(9,562)					(9,562)
Retirement savings plan and dividend reinvestment plan (shares)				8,886
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		1,208		$ 5		1,203
Share-based compensation (shares)				6,520
Share-based compensation and tax benefit		1,972		$ 3		1,969
Treasury stock activities							0		541		(541)
Ending Balances (shares) at Jun. 30, 2022	[1]			17,734,794
Ending Balances at Jun. 30, 2022		$ 815,701	[1]	$ 8,632	[1]	376,866	428,833	1,370	7,018		(7,018)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		110,835
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		$ 1.125
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		52,477					52,477
Other comprehensive income (loss)		(1,680)						(1,680)
Other Comprehensive Income (Loss), Net of Tax		(1,680)
Dividend declared		(20,191)					(20,191)
Retirement savings plan and dividend reinvestment plan (shares)				0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		(19)		$ 0		(19)
Share-based compensation (shares)	[3],[4]			55,323
Share-based compensation and tax benefit	[3],[4]	840		$ 27		813
Treasury stock activities							0		1,941		(1,941)
Ending Balances (shares) at Jun. 30, 2023	[1]			17,796,741
Ending Balances at Jun. 30, 2023		$ 864,228	[1]	$ 8,662	[1]	380,830	477,795	(3,059)	9,001		(9,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		19,859
Common Stock, Dividends, Per Share, Declared		$ 0.5900
Beginning Balances (shares) at Mar. 31, 2023				17,789,856
Beginning Balances at Mar. 31, 2023		$ 858,588		$ 8,659		379,703	472,209	(1,983)	8,816		(8,816)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		16,133					16,133
Other comprehensive income (loss)		(1,076)						(1,076)
Other Comprehensive Income (Loss), Net of Tax		(1,076)
Dividend declared		(10,547)					(10,547)
Retirement savings plan and dividend reinvestment plan (shares)				0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		(8)		$ 0		(8)
Share-based compensation (shares)				6,885
Share-based compensation and tax benefit		1,138		$ 3		1,135
Treasury stock activities							0		185		(185)
Ending Balances (shares) at Jun. 30, 2023	[1]			17,796,741
Ending Balances at Jun. 30, 2023		$ 864,228	[1]	$ 8,662	[1]	$ 380,830	$ 477,795	$ (3,059)	$ 9,001		$ (9,001)
Preferred Stock, Shares Authorized		2,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		110,277

[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 110,277, 108,143, 110,835, and 116,238 shares at June 30, 2023, December 31, 2022, June 30, 2022 and December 31, 2021, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan.(3)Can include shares issued under the Retirement Savings Plan, DRIP and ATM equity issuances.

[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 six months ended June 30, 2023 and 2022, we withheld 19,859 and 21,832 shares, respectively, for employee taxes.