Subordinated Debentures and Junior Subordinated Debentures Owed to Unconsolidated Subsidiary Trust - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Sep. 30, 2020	Mar. 31, 2007	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Proceeds from subordinated debentures			$ 48,893	$ 48,777
Period for Interest Deferral on Trust Preferred Securities			5 years
Premier Statutory Trusts II [Member]
Debt Instrument [Line Items]
Proceeds from subordinated debentures		$ 15,500
Proceeds from Issuance of Trust Preferred Securities		$ 15,000
Coupon Rate on Preferred Securities, Period End			1.70%	1.72%
Preferred Securities Variable Interest Rate			LIBOR rate plus 1.5%
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Description			The Trust Preferred Securities and Subordinated Debentures mature on June 15, 2037, but can be redeemed at the Company’s option at any time now.
Premier Statutory Trusts I [Member]
Debt Instrument [Line Items]
Proceeds from subordinated debentures			$ 20,600
Proceeds from Issuance of Trust Preferred Securities			$ 20,000
Coupon Rate on Preferred Securities, Period End			1.58%	1.60%
Preferred Securities Variable Interest Rate			LIBOR rate plus 1.38%
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Description			The Trust Preferred Securities and Subordinated Debentures mature on December 15, 2035, but can be redeemed at the Company’s option at any time now.
Subordinated Debt [Member]
Debt Instrument [Line Items]
Aggregate principal amount	$ 50,000
Subordinated notes, due date	Sep. 30, 2030
Subordinated notes, fixed Interest rate	4.00%
Subordinated notes, fixed interest rate, period	5 years
Basis spread on variable rate	388.50%
Proceeds from subordinated debentures	$ 48,700