Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Accounts receivable and unbilled revenues—net	$ (49,268)	$ (112,725)
Gas costs and other regulatory assets/liabilities—net	31,100	(11,285)
Storage gas	119,217	(3,399)
Prepaid taxes	(4,711)	11,309
Accounts payable and other accrued liabilities	(10,911)	30,677
Customer deposits and advance payments	(1,325)	(24,908)
Accrued taxes	10,753	4,987
Other current assets	35,291	(17,386)
Other current liabilities	(9,298)	14,588
Deferred gas costs—net	26,212	12,702
Deferred assets—other	(20,424)	(10,890)
Deferred liabilities—other	3,837	76
Pension and other post-retirement benefits	(1,344)	(7,178)
Other—net	3,594	2,379
Changes in operating assets and liabilities	132,723	(111,053)
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Income taxes paid (refunded)—net	649	(3,890)
Interest paid	54,533	53,027
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Extinguishment of project debt financing	(28,312)	(27,927)
Capital expenditure accruals included in accounts payable and other accrued liabilities	40,986	38,101
Dividends Paid in Common Stock		1,362
Stock based compensation	12,389	6,564
Transfer of investments to fixed assets	10,054	30,114
Transfer of notes receivables to investments		10,031
Washington Gas Light Company
Accounts receivable and unbilled revenues—net	(45,234)	(109,427)
Gas costs and other regulatory assets/liabilities—net	31,100	(11,285)
Storage gas	38,076	15,270
Prepaid taxes	346	5,127
Accounts payable and other accrued liabilities	8,179	32,724
Customer deposits and advance payments	(125)	(20,107)
Accrued taxes	10,350	2,928
Other current assets	(7,329)	(4,945)
Other current liabilities	(368)	37
Deferred gas costs—net	26,212	12,702
Deferred assets—other	(19,084)	(7,527)
Deferred liabilities—other	(10,233)	489
Pension and other post-retirement benefits	(1,426)	(7,178)
Other—net	3,255	2,550
Changes in operating assets and liabilities	33,719	(88,642)
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Income taxes paid (refunded)—net	(958)
Interest paid	31,061	36,202
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Extinguishment of project debt financing	(28,312)	(27,927)
Capital expenditure accruals included in accounts payable and other accrued liabilities	$ 26,472	$ 28,666

WGL HOLDINGS INC 10-Q