CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Net Cash Provided by Operating Activities	$ 173,396	$ 127,081
Cash Flows from Investing Activities:
Capital Expenditures	(200,770)	(205,604)
Cash Paid for Acquisition, Net of Cash Acquired	(1,740,375)	0
Asset Management Agreement, Long-term Contract, Consideration Paid	(11,389)	0
Proceeds from Sale of Property, Plant & Equipment	51	3,547
Investment in Long-Term Receivables	(6,167)	(6,670)
Proceeds from Long-Term Receivables	7,414	7,468
Notes Receivable	0	3,000
Purchase of Company-Owned Life Insurance	(1,148)	(8,765)
Investment in Affiliate	(9,524)	(22,434)
Net Repayment of Notes Receivable - Affiliate	1,360	41
Net Cash Used in Investing Activities	(1,960,548)	(229,417)
Cash Flows from Financing Activities:
Net Borrowings from (Repayments of) Short-Term Credit Facilities	75,000	(16,000)
Proceeds from Issuance of Long-Term Debt	1,592,500	446,000
Principal Repayments of Long-Term Debt	(10,000)	(292,400)
Payments for Issuance of Long-Term Debt	(16,914)	(3,744)
Net Settlement of Restricted Stock	(776)	(751)
Dividends on Common Stock	(46,233)	(43,353)
Proceeds from Sale of Common Stock	173,750	0
Payments for the Issuance of Common Stock	(6,554)	0
Net Cash Provided by Financing Activities	1,760,773	89,752
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(26,379)	(12,584)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	39,695	31,910
Cash, Cash Equivalents and Restricted Cash at End of Period	13,316	19,326
SJG Utility Operations
Net Cash Provided by Operating Activities	86,788	73,186
Cash Flows from Investing Activities:
Capital Expenditures	(168,654)	(183,875)
Investment in Long-Term Receivables	(6,167)	(6,670)
Purchase of Company-Owned Life Insurance	0	(4,875)
Proceeds from Long-Term Receivables	7,414	7,468
Net Cash Used in Investing Activities	(167,407)	(187,952)
Cash Flows from Financing Activities:
Net Borrowings from (Repayments of) Short-Term Credit Facilities	88,200	(104,300)
Proceeds from Issuance of Long-Term Debt	0	396,000
Principal Repayments of Long-Term Debt	(10,000)	(215,000)
Payments for Issuance of Long-Term Debt	(21)	(2,030)
Additional Investment by Shareholder	0	40,000
Net Cash Provided by Financing Activities	78,179	114,670
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(2,440)	(96)
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	4,619	1,391
Cash, Cash Equivalents and Restricted Cash at End of Period	$ 2,179	$ 1,295