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Investments - Gross Unrealized Losses - Tabular Disclosure (Details)
$ in Thousands
Mar. 31, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
security
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security 181 634
Gross Unrealized Losses, Less than twelve months $ (441) $ (248)
Fair Value, Less than twelve months 159,382 56,109
Gross Unrealized Losses, Twelve months or more (18,576) (24,205)
Fair Value, Twelve months or more 254,031 666,699
Total, Gross Unrealized Losses (19,017) (24,453)
Total, Fair Value $ 413,413 $ 722,808
U.S. Government Agencies [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security 14 14
Gross Unrealized Losses, Less than twelve months $ (62) $ (97)
Fair Value, Less than twelve months 25,523 46,823
Gross Unrealized Losses, Twelve months or more (87)  
Fair Value, Twelve months or more 27,913 3,929
Total, Gross Unrealized Losses (149) (97)
Total, Fair Value $ 53,436 $ 50,752
Mortgage-Backed Securities [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security 39 321
Fair Value, Less than twelve months   $ 20
Gross Unrealized Losses, Twelve months or more $ (751) (1,222)
Fair Value, Twelve months or more 9,578 94,505
Total, Gross Unrealized Losses (751) (1,222)
Total, Fair Value $ 9,578 $ 94,525
States and Political Subdivisions [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security 48 201
Gross Unrealized Losses, Less than twelve months $ (1) $ (33)
Fair Value, Less than twelve months 201 6,950
Gross Unrealized Losses, Twelve months or more (6,465) (6,390)
Fair Value, Twelve months or more 35,646 125,283
Total, Gross Unrealized Losses (6,466) (6,423)
Total, Fair Value $ 35,847 $ 132,233
Corporate Bond [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security 51 51
Gross Unrealized Losses, Less than twelve months   $ (118)
Fair Value, Less than twelve months   2,316
Gross Unrealized Losses, Twelve months or more $ (10,644) (13,115)
Fair Value, Twelve months or more 54,659 49,724
Total, Gross Unrealized Losses (10,644) (13,233)
Total, Fair Value $ 54,659 $ 52,040
Collateralized Loan Obligations [Member]    
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, total | security 29 47
Gross Unrealized Losses, Less than twelve months $ (378)  
Fair Value, Less than twelve months 133,658  
Gross Unrealized Losses, Twelve months or more (629) $ (3,478)
Fair Value, Twelve months or more 126,235 393,258
Total, Gross Unrealized Losses (1,007) (3,478)
Total, Fair Value $ 259,893 $ 393,258