Employee Benefit Plans - Additional information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Employee Contribution Plan Description	Premier matches 100% of the participants’ contributions up to 3% of compensation and then 50% of the participants’ contributions for the next 2% of compensation
Employee Benefits Plans Contribution	$ 2,600,000	$ 2,500,000	$ 1,400,000
Liability for Future Policy Benefits, Period (Recovery)/Expense	(121,000)	40,000,000	60,000
Liability for Future Policy Benefits	1,700,000	1,800,000
Deferred Compensation Arrangement with Individual, Compensation Expense	(66,000)	(11,000)	$ 85,000
Deferred Compensation Plan Assets	9,400,000	8,200,000
Deferred Compensation Plan Liabilities	$ 7,400,000	6,800,000
Deferred compensation plan deferral period years	up to 11 years
United Community Financial Corp
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Compensation Plan Assets	$ 1,800,000	1,900,000
Deferred Compensation Plan Liabilities	$ 1,800,000	$ 1,900,000