XML 50 R40.htm IDEA: XBRL DOCUMENT v3.22.2.2
Investments (Narrative) (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2022
USD ($)
security
item
Dec. 31, 2021
USD ($)
security
Schedule of Available-for-sale Securities [Line Items]    
Fair value $ 492,032 $ 529,811
Number of investments in a single issuer exceeds 10% of shareholders' equity | item 0  
Percent of shareholders equity benchmark for investments in a single issuer 10.00%  
Number of debt securities | security 599 227
Fair value of temporarily impaired securities $ 475,355 $ 271,525
Unrealized Losses 65,026 4,666
Total unrealized loss position increased over prior year $ 60,100  
Number Of Bond Issuers | item 201  
Number Of Bonds Below Investment Grade | item 0  
General Obligation Bonds 64.00%  
Equity securities $ 435 481
Texas [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Percent of Investment Portfolio 14.00%  
Pennsylvania [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Percent of Investment Portfolio 11.00%  
CALIFORNIA    
Schedule of Available-for-sale Securities [Line Items]    
Percent of Investment Portfolio 11.00%  
MICHIGAN    
Schedule of Available-for-sale Securities [Line Items]    
Percent of Investment Portfolio 10.00%  
Corporate [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fair value $ 24,622 $ 24,939
Number of debt securities | security 46 20
Fair value of temporarily impaired securities $ 22,972 $ 10,648
Unrealized Losses 1,689 188
Public Funds And Trust Deposits [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Fair value $ 222,700 $ 160,300
Equity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Number of equity investments | item 1