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		108,000
Common Stock, Dividends, Per Share, Declared		$ 1.125
Beginning Balances (shares) at Dec. 31, 2022	[1],[2]			17,741,000
Beginning Balances at Dec. 31, 2022		$ 832,801		$ 8,635	[1]	$ 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)	[1],[2],[3]			0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]			$ 0	[1]	(19)
Share-based compensation (shares)	[1],[2],[4],[5]			56,000
Share-based compensation and tax benefit		(19)	[3]	$ 27	[1],[4],[5]	813	[4],[5]
Treasury stock activities		840	[4],[5]					0	[2]		1,941	[2]		(1,941)	[2]
Ending Balances (shares) at Jun. 30, 2023	[1],[2]			17,797,000
Ending Balances at Jun. 30, 2023		$ 864,228		$ 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		20,000
Common Stock, Dividends, Per Share, Declared		$ 0.590
Beginning Balances (shares) at Mar. 31, 2023	[1],[2]			17,790,000
Beginning Balances at Mar. 31, 2023		$ 858,588		$ 8,659	[1]	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)	[1],[2],[3]			0
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]	(8)		$ 0	[1]	(8)
Share-based compensation (shares)	[1],[2],[4],[5]			7,000
Share-based compensation and tax benefit	[4],[5]	1,138		$ 3	[1]	1,135
Treasury stock activities								0			185			(185)
Ending Balances (shares) at Jun. 30, 2023	[1],[2]			17,797,000
Ending Balances at Jun. 30, 2023		$ 864,228		$ 8,662	[1]	380,830		477,795		(3,059)	9,001			(9,001)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		110,000
Preferred Stock, Shares Authorized		2,000,000,000
Preferred Stock, Par or Stated Value Per Share		$ 10.00
Shares Held In Trust For Deferred Compensation Plan		108,000
Common Stock, Dividends, Per Share, Declared		$ 1.230
Beginning Balances (shares) at Dec. 31, 2023	[1],[2],[6]			22,235,000
Beginning Balances at Dec. 31, 2023	[6]	$ 1,246,104		$ 10,823	[1]	749,356		488,663		(2,738)	9,050			(9,050)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		64,439						64,439
Other comprehensive income (loss)		1,162								1,162
Other Comprehensive Income (Loss), Net of Tax		1,162
Dividend declared		(27,577)						(27,577)
Retirement savings plan and dividend reinvestment plan (shares)	[1],[2],[3]			28,000
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]	2,892		$ 13	[1]	2,879
Share-based compensation (shares)	[1],[2],[4],[5]			36,000
Share-based compensation and tax benefit	[4],[5]	3,534		$ 18	[1]	3,516
Treasury stock activities	[2]							0			653			(653)
Ending Balances (shares) at Jun. 30, 2024	[1],[2]			22,299,000
Ending Balances at Jun. 30, 2024		$ 1,290,554		$ 10,854	[1]	755,751		525,525		(1,576)	9,703			(9,703)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		14,000
Proceeds from Issuance of Senior Long-Term Debt		$ 550,000		$ 4,400
Common Stock, Dividends, Per Share, Declared		$ 0.640
Beginning Balances (shares) at Mar. 31, 2024	[1],[2]			22,267,000
Beginning Balances at Mar. 31, 2024		$ 1,280,903		$ 10,838	[1]	750,162		521,689		(1,786)	9,562		$ (9,562)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		18,271						18,271
Other comprehensive income (loss)		210								210
Other Comprehensive Income (Loss), Net of Tax		210
Dividend declared		(14,435)						(14,435)
Retirement savings plan and dividend reinvestment plan (shares)	[1],[2],[3]			25,000
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan	[3]	2,619		$ 12	[1]	2,607
Share-based compensation (shares)	[1],[2],[4],[5]			7,000
Share-based compensation and tax benefit	[4],[5]	2,986		$ 4	[1]	2,982
Treasury stock activities								0			141			(141)
Ending Balances (shares) at Jun. 30, 2024	[1],[2]			22,299,000
Ending Balances at Jun. 30, 2024		$ 1,290,554		$ 10,854	[1]	$ 755,751		$ 525,525		$ (1,576)	$ 9,703			$ (9,703)
Preferred Stock, Shares Authorized		2,000,000.0
Preferred Stock, Par or Stated Value Per Share		$ 10.00
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares Held In Trust For Deferred Compensation Plan		113,000

[1] 2.0 million 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 Condensed Consolidated Statements of Stockholders’ Equity.    

[2] Includes 113 thousand, 108 thousand, 110 thousand, and 108 thousand shares at June 30, 2024, December 31, 2023, June 30, 2023 and December 31, 2022, respectively, held in a Rabbi Trust related to our Non-Qualified Deferred Compensation Plan.

[3] Includes shares issued under the Retirement Savings Plan and DRIP and/or ATM as applicable.

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

[5] The shares issued under the SICP are net of shares withheld for employee taxes. For the six months ended June 30, 2024 and 2023, we withheld 14 thousand and 20 thousand shares, respectively, for employee taxes.

[6] Includes 4.4 million shares issued during 2023 related to the acquisition of FCG. See Notes 3 and 9 for details associated with the FCG acquisition and related financing.