Schedules of Investments (Unaudited) - Investments (Details) $ in Thousands	Jun. 30, 2016 USD ($) oz	Mar. 31, 2016 USD ($) oz	Dec. 31, 2015 USD ($) oz	Jun. 30, 2015 USD ($) oz	Mar. 31, 2015 USD ($) oz	Dec. 31, 2014 USD ($) oz
Gold bullion ounces | oz	6,693,000	5,990,500	4,905,600	5,394,600	5,302,300	5,182,200
Gold bullion cost	$ 8,091,223	$ 7,174,407	$ 5,910,176	$ 6,521,548	$ 6,411,164	$ 6,254,868
Gold bullion	8,839,732		5,210,940
Less Liabilities	(1,672)		(1,137)
Net Assets	$ 8,838,060		$ 5,209,803			$ 6,213,387