Consolidated Statements of Stockholders' Equity - USD ($)		Total		Florida City Gas	Common Stock [Member]	Common Stock [Member] Florida City Gas	Additional Paid-In Capital [Member]	Additional Paid-In Capital [Member] Florida City Gas	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Deferred Compensation [Member]	Treasury Stock, Common
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
Stock Issued During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan					147,256
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		18,248,000					18,176,000
Share-based compensation, shares					46,313
Share-based compensation		4,526,000	[3],[4]		$ 22,000		4,504,000					0
Treasury stock activities		0									1,561,000	(1,561,000)
Shares, Issued	[1],[2]				17,655,410
Stockholders' Equity Attributable to Parent		774,130,000	[2]		$ 8,593,000		371,162,000		393,072,000	1,303,000	7,240,000	(7,240,000)
Net Income		89,796,000							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					$ 19,000		5,273,000
Stock Issued During The Period Value Retirement Savings Plan And Dividend Reinvestment Plan		5,292,000
Share-based compensation, shares	[3],[4]				46,590
Share-based compensation		3,624,000	[3],[4]		$ 23,000		3,601,000
Treasury stock activities		$ 0									(180,000)	180,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan		100,000			39,418
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)
Net Income		87,212,000							87,212,000
Stock Issued During Period, Value, Acquisitions				$ 366,417,000		$ 2,160,000		$ 364,257,000
Other comprehensive loss		(1,359,000)								(1,359,000)
Dividends		(44,058,000)							(44,058,000)
Stock Issued, Value, During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan		(26,000)			$ 0		(26,000)
Stock Issued During The Period Shares Retirement Savings Plan And Dividend Reinvestment Plan					0
Share-based compensation, shares	[3],[4]				55,323
Share-based compensation		5,117,000	[3],[4]		$ 28,000		5,089,000
Treasury stock activities		0									1,990,000	(1,990,000)
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares				4,438,596		4,400,000
Shares, Issued	[1],[2]				22,235,337
Stockholders' Equity Attributable to Parent		$ 1,246,104,000			$ 10,823,000		$ 749,356,000		$ 488,663,000	$ (2,738,000)	$ 9,050,000	$ (9,050,000)

[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 107,623, 108,143 and 116,238 shares at December 31, 2023, 2022 and 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 2023, 2022 and 2021, we withheld 19,859, 21,832 and 14,020 shares, respectively, for taxes. (5) Includes shares issued under the Retirement Savings Plan, DRIP and/or ATM equity issuances, as applicable.