Formation Related Costs - Schedule of Formation Related Costs (Details) $ in Thousands	1 Months Ended
	Dec. 31, 2014 USD ($)
Restructuring Cost And Reserve [Line Items]
Total formation related costs	$ 143,437
IPO [Member]
Restructuring Cost And Reserve [Line Items]
Total formation related costs	143,437
IPO [Member] | Founders Grants [Member]
Restructuring Cost And Reserve [Line Items]
Total formation related costs	71,000
IPO [Member] | Transfer Taxes [Member]
Restructuring Cost And Reserve [Line Items]
Total formation related costs	51,306
IPO [Member] | Accounting, Legal and Other Professional Fees [Member]
Restructuring Cost And Reserve [Line Items]
Total formation related costs	$ 21,131