XML 136 R126.htm IDEA: XBRL DOCUMENT v3.22.1
OTHER COMPREHENSIVE LOSS - Change in Accumulated Other Comprehensive Loss by Component (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance $ (83,999)  
Ending balance (415,833)  
Pension And Postretirement Benefit Plans [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance 3,391 $ (270)
Other comprehensive (loss) income 0 0
Ending balance 3,391 (270)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] | Debt Securities [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Beginning balance (87,390) 55,725
Other comprehensive (loss) income (331,834) (98,929)
Ending balance $ (419,224) $ (43,204)