CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Statement Of Financial Position [Abstract]
Finite-lived intangible assets, accumulated amortization (in dollars)	$ 82,297	$ 62,543
Below market lease, accumulated amortization (in dollars)	$ 18,607	$ 15,177
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	42,412,827	37,545,790
Common stock, shares outstanding	42,412,827	37,545,790
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	4,000,000	4,000,000