XML 68 R57.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Accumulated Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance $ 1,443,006 $ 1,217,317
Other Comprehensive (Loss) Income Before Reclassifications, net of tax (24) 80
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (63) (26)
Total Other Comprehensive Income (Loss) (87) 54
Ending balance 1,497,464 1,263,777
Pension and Other Postretirement Benefits    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 1,375 1,334
Other Comprehensive (Loss) Income Before Reclassifications, net of tax 0 0
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (74) (26)
Total Other Comprehensive Income (Loss) (74) (26)
Ending balance 1,301 1,308
Net Unrealized Gains (Losses) on Available-for-Sale Securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance (227) (419)
Other Comprehensive (Loss) Income Before Reclassifications, net of tax (24) 80
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) 11 0
Total Other Comprehensive Income (Loss) (13) 80
Ending balance (240) (339)
Accumulated Other Comprehensive Income (Loss)    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Beginning balance 1,148 915
Total Other Comprehensive Income (Loss) (87) 54
Ending balance $ 1,061 $ 969