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Fair Value Measurements (Changes in Fair Value of Securities Using Level 3 Inputs) (Details) - Equity Securities [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Obligations of States and Political Subdivisions [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year $ 7,745 $ 2,894
Total net (losses) gains for the period included in OCI (985) (239)
Purchases 0 0
Sales 0 0
Issuances 0 0
Settlements 0 0
Transfers into Level 3 0 5,101
Transfers out of Level 3 0 0
Fair Value, End of Year 6,661 7,745
Change in unrealized (losses) gains for the period included in earnings for assets held at period end (99) (11)
Change in unrealized losses (gains) for the period included in OCI for assets held at period end (985) (239)
Corporate Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year 114,127 70,700
Total net (losses) gains for the period included in OCI (23,624) 1,636
Purchases 99,868 64,813
Sales 0 0
Issuances 0 0
Settlements (10,148) (544)
Transfers into Level 3 19,214 981
Transfers out of Level 3 (9,111) (23,436)
Fair Value, End of Year 187,980 114,127
Change in unrealized (losses) gains for the period included in earnings for assets held at period end (2,399) (50)
Change in unrealized losses (gains) for the period included in OCI for assets held at period end (23,630) (1,636)
Collateralized Loan Obligations and Other Asset-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year 124,909 56,375
Total net (losses) gains for the period included in OCI (11,287) (520)
Purchases 100,406 76,731
Sales 0 0
Issuances 0 0
Settlements (12,361) (5,161)
Transfers into Level 3 502 11,344
Transfers out of Level 3 (48,180) (13,662)
Fair Value, End of Year 153,342 124,909
Change in unrealized (losses) gains for the period included in earnings for assets held at period end (876) (214)
Change in unrealized losses (gains) for the period included in OCI for assets held at period end (11,246) (520)
Residential Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year 245 0
Total net (losses) gains for the period included in OCI (17) 0
Purchases 0 249
Sales 0 0
Issuances 0 0
Settlements (11) (4)
Transfers into Level 3 0 0
Transfers out of Level 3 (217) 0
Fair Value, End of Year 0 245
Change in unrealized (losses) gains for the period included in earnings for assets held at period end 0 0
Change in unrealized losses (gains) for the period included in OCI for assets held at period end (17) 0
Commercial Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year 4,256 0
Total net (losses) gains for the period included in OCI (481) (196)
Purchases 0 98
Sales 0 0
Issuances 0 0
Settlements (15) (52)
Transfers into Level 3 0 4,382
Transfers out of Level 3 (3,430) 0
Fair Value, End of Year 375 4,256
Change in unrealized (losses) gains for the period included in earnings for assets held at period end 0 (5)
Change in unrealized losses (gains) for the period included in OCI for assets held at period end (481) (196)
Common Stock [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year 0  
Total net (losses) gains for the period included in OCI 0  
Purchases 0  
Sales 0  
Issuances 0  
Settlements 0  
Transfers into Level 3 897  
Transfers out of Level 3 0  
Fair Value, End of Year 897 0
Change in unrealized (losses) gains for the period included in earnings for assets held at period end 0  
Change in unrealized losses (gains) for the period included in OCI for assets held at period end 0  
Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Fair Value, Beginning of Year 251,282 129,969
Total net (losses) gains for the period included in OCI (36,394) 681
Purchases 200,274 141,891
Sales 0 0
Issuances 0 0
Settlements (22,535) (5,761)
Transfers into Level 3 20,613 21,808
Transfers out of Level 3 (60,938) (37,098)
Fair Value, End of Year 349,255 251,282
Change in unrealized (losses) gains for the period included in earnings for assets held at period end (3,374) (270)
Change in unrealized losses (gains) for the period included in OCI for assets held at period end (36,359) (681)
Net Investment Income Earned [Member] | Obligations of States and Political Subdivisions [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 0 0
Net Investment Income Earned [Member] | Corporate Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 68 27
Net Investment Income Earned [Member] | Collateralized Loan Obligations and Other Asset-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 229 16
Net Investment Income Earned [Member] | Residential Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 0 0
Net Investment Income Earned [Member] | Commercial Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 45 19
Net Investment Income Earned [Member] | Common Stock [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 0  
Net Investment Income Earned [Member] | Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 342 62
Gain (Loss) on Investments [Member] | Obligations of States and Political Subdivisions [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income (99) (11)
Gain (Loss) on Investments [Member] | Corporate Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income (2,414) (50)
Gain (Loss) on Investments [Member] | Collateralized Loan Obligations and Other Asset-Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income (876) (214)
Gain (Loss) on Investments [Member] | Residential Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 0 0
Gain (Loss) on Investments [Member] | Commercial Mortgage Backed Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 0 5
Gain (Loss) on Investments [Member] | Common Stock [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income 0  
Gain (Loss) on Investments [Member] | Investments [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total net (losses) gains for the period included in net income $ (3,389) $ (270)