Subsequent Events	9 Months Ended
	Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn November 5, 2020, United’s Board of Directors approved a regular quarterly cash dividend of $0.18 per common share and a preferred stock dividend of $429.6875 per preferred share (equivalent to $0.4296875 per depositary share, or 1/1000 interest per share). The common stock dividend is payable January 5, 2021, to shareholders of record on December 15, 2020. The preferred stock dividend is payable December 15, 2020, to shareholders of record on November 30, 2020.In addition, the Board of Directors authorized an increase in the Company’s share repurchase program to $50 million of its outstanding common shares and extended the expiration of the authorization to December 31, 2021.