Earnings per Share - Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator
Net income attributable to UIHC common stockholders	$ (12,723)	$ 9,469
Denominator
Weighted-average shares outstanding	42,805,527	42,696,681
Effect of dilutive securities	0	289,803
Weighted-average diluted shares	42,805,527	42,986,484
Basic earnings per share	$ (0.30)	$ 0.22
Diluted earnings per share	$ (0.30)	$ 0.22