XML 83 R71.htm IDEA: XBRL DOCUMENT v3.22.0.1
LONG-TERM DEBT - Other Long-term Debt (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Nov. 06, 2020
Sep. 19, 2016
Oct. 10, 2007
Aug. 10, 2007
Aug. 08, 2007
May 20, 2005
[6]
Sep. 04, 2003
Debt Instruments [Abstract]                  
Subordinated notes, net of unamortized debt issuance costs [1] $ 98,534 $ 197,251              
Trust preferred subordinated debentures [2] 60,260 60,255              
Total long-term obligations 158,794 257,506              
3.875% Subordinated Notes                  
Debt Instruments [Abstract]                  
Subordinated notes, net of unamortized debt issuance costs [1],[3] 98,534 98,497              
Unamortized debt issuance expense 1,500 1,500              
Stated interest rate     3.875%            
5.50% Subordinated Notes                  
Debt Instruments [Abstract]                  
Subordinated notes, net of unamortized debt issuance costs [1],[4] 0 98,754              
Unamortized debt issuance expense   $ 1,200              
Stated interest rate   5.50%   5.50%          
Southside Statutory Trust III, net of unamortized debt issuance costs                  
Debt Instruments [Abstract]                  
Trust preferred subordinated debentures 20,568 [2],[5] $ 20,563 [2],[5]             $ 20,619
Unamortized debt issuance expense 51 56              
Southside Statutory Trust IV                  
Debt Instruments [Abstract]                  
Trust preferred subordinated debentures 23,196 [2] 23,196 [2]         $ 23,196    
Southside Statutory Trust V                  
Debt Instruments [Abstract]                  
Trust preferred subordinated debentures 12,887 [2] 12,887 [2]       $ 12,887      
Magnolia Trust Company I                  
Debt Instruments [Abstract]                  
Trust preferred subordinated debentures $ 3,609 [2] $ 3,609 [2]     $ 3,600     $ 3,609  
Minimum | 5.50% Subordinated Notes                  
Debt Instruments [Abstract]                  
Long-term debt, remaining maturity, greater than 1 year                
[1] This debt consists of subordinated notes with a remaining maturity greater than one year that qualify under the risk-based capital guidelines as Tier 2 capital, subject to certain limitations.
[2] This debt consists of trust preferred securities that qualify under the risk-based capital guidelines as Tier 1 capital, subject to certain limitations.
[3] The unamortized discount and debt issuance costs reflected in the carrying amount of the subordinated notes totaled approximately $1.5 million at December 31, 2021 and 2020.
[4] The unamortized discount and debt issuance costs reflected in the carrying amount of the subordinated notes totaled approximately $1.2 million at December 31, 2020.
[5] The unamortized debt issuance costs reflected in the carrying amount of the Southside Statutory Trust III junior subordinated debentures totaled $51,000 at December 31, 2021 and $56,000 at December 31, 2020.
[6] On October 10, 2007, as part of an acquisition we assumed $3.6 million of floating rate junior subordinated debentures issued in 2005 to Magnolia Trust Company I.