NW Holdings Statement of Cash Flows (Unaudited) Statement - USD ($) $ in Thousands	7 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Cash provided by (used in) financing activities		$ 29,039
Increase in cash and cash equivalents		26,493
Cash and cash equivalents, beginning of period		3,472
Cash and cash equivalents, end of period	$ 29,965	29,965
Northwest Natural Holding Company [Member]
Capital contributions	20,000
Cash provided by (used in) financing activities	20,000
Increase in cash and cash equivalents	20,000
Cash and cash equivalents, end of period	$ 20,000	$ 20,000