Derivative Instruments (Details 1) - Western Alliance Bank [Member] - Subsequent Event [Member] kr in Thousands, $ in Thousands	1 Months Ended
	Feb. 19, 2020 USD ($)	Feb. 19, 2020 NOK (kr)
Amount | $	$ 2,100
Mar-20 [Member]
Settlement Date	Mar. 31, 2020	Mar. 31, 2020
Amount | $	$ 350
Apr-20 [Member]
Settlement Date	Apr. 30, 2020	Apr. 30, 2020
Amount | $	$ 350
May-20 [Member]
Settlement Date	May 31, 2020	May 31, 2020
Amount | $	$ 350
Jun-20 [Member]
Settlement Date	Jun. 30, 2020	Jun. 30, 2020
Amount | $	$ 350
Jul-20 [Member]
Settlement Date	Jul. 31, 2020	Jul. 31, 2020
Amount | $	$ 350
Aug-20 [Member]
Settlement Date	Aug. 31, 2020	Aug. 31, 2020
Amount | $	$ 350
NOK [Member]
Amount | kr		kr 19,298,644
NOK [Member] | Mar-20 [Member]
Amount | kr		3,216,849
NOK [Member] | Apr-20 [Member]
Amount | kr		3,216,534
NOK [Member] | May-20 [Member]
Amount | kr		3,216,464
NOK [Member] | Jun-20 [Member]
Amount | kr		3,216,359
NOK [Member] | Jul-20 [Member]
Amount | kr		3,216,114
NOK [Member] | Aug-20 [Member]
Amount | kr		kr 3,216,324