Equity - Public Offering of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended
	Apr. 15, 2019	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net, (in shares)	6,641,250
Common stock, par value (in usd per share)	$ 0.01	$ 0.01		$ 0.01
Shares price to the public (in usd per share)	$ 23.35
Proceeds from the issuance of common stock, net	$ 149,000	$ 196,041	$ 47,547
Over-Allotment Option
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock, net, (in shares)	866,250