Equity Offering (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Jun. 30, 2015
Class of Stock [Line Items]
Proceeds from issuance of common stock net of offering expenses	$ 381,137	$ 398,600
Common Stock
Class of Stock [Line Items]
Shares issued through public equity offering	18,170,000	5,700,000