Acquisitions - Schedule of Unaudited Pro Forma Information (Detail) - Cisneros Interactive - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020
Pro Forma:
Total revenue	$ 87,152	$ 191,620
Net income (loss)	3,848	(30,500)
Net (income) loss attributable to redeemable noncontrolling interest	(723)	(1,333)
Net income (loss) attributable to common stockholders	$ 3,125	$ (31,833)
Basic and diluted earnings per share:
Net income (loss) per share, attributable to common stockholders, basic and diluted	$ 0.04	$ (0.38)
Weighted average common shares outstanding, basic	84,123,530	84,220,649
Weighted average common shares outstanding, diluted	84,669,250	84,220,649