XML 81 R71.htm IDEA: XBRL DOCUMENT v3.23.1
Trust Preferred Securities (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Trust Preferred Securities [Abstract]    
Trust preferred securities, description On September 15, 2005, RST II, a wholly-owned subsidiary of the Company, closed a pooled private offering of 10,000 Capital Securities with a liquidation amount of $1,000 per security. The proceeds of the offering were loaned to the Company in exchange for junior subordinated debentures with terms similar to the Capital Securities. Distributions on the Capital Securities are payable quarterly at a variable rate that is currently based upon the 3-month LIBOR plus 1.80 percent and are included in interest expense in the consolidated financial statements. The issuers of these securities have proposed Secured Overnight Financing Rate (“SOFR”) as a replacement rate for the LIBOR-based interest rate and will amend the documents governing the securities prior to LIBOR cessation. These securities may be included in Tier 1 capital and may be prepaid at any time without penalty (with certain limitations applicable) under current regulatory guidelines and interpretations.  
Capital securities $ 10.3 $ 10.3
Maturity date Sep. 15, 2035