Trust Account and Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The following table presents information about the Company’s assets that are measured at fair value on a recurring basis as of December 31, 2016 and 2015 and indicates the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value. In addition, the table presents the carrying value under ASC 320, excluding accrued interest income and gross unrealized holding gain. Since all of the Company’s permitted investments consist of U.S. government treasury bills and cash, fair values of its investments are determined by Level 1 inputs utilizing quoted prices (unadjusted) in active markets for identical assets as follows:

					Quoted prices in
	Carrying Value at		Gross unrealized		Active Markets
	December 31, 2016		Holding Losses		(Level 1)
Treasury Securities Held as of December 31, 2016 due January and February 2017	$	501,340,048	$	(23,491)	$	501,316,557

					Quoted prices in
	Carrying Value at		Gross unrealized		Active Markets
	December 31, 2015		Holding Gains		(Level 1)
Treasury Securities Held as of December 31, 2015 and due March 2016	$	500,080,274	$	20,595	$	500,100,869