Derivative Instruments (Details) - Western Alliance Bank [Member] - Feb-20 [Member] kr in Thousands, $ in Thousands	6 Months Ended
	Jan. 31, 2020 USD ($)	Jan. 31, 2020 NOK (kr)
Settlement Date	Feb. 29, 2020	Feb. 29, 2020
Amount | $	$ 400
NOK [Member]
Amount | kr		kr 3,553,560