Investments Held in Trust Account (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Investments held in trust account
Amount placed in trust account	$ 220.5	$ 220.5
United States Treasury Securities
Investments held in trust account
Investment securities in trust account	$ 220.5	$ 220.5
United States Treasury Securities | Maximum
Investments held in trust account
Maturity period	180 days	180 days