Investments - Gross Unrealized Losses - Tabular Disclosure (Details) $ in Thousands	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) 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	881	98
Gross Unrealized Losses, Less than twelve months	$ (70,500)	$ (2,754)
Fair Value, Less than twelve months	981,246	313,276
Gross Unrealized Losses, Twelve months or more	(5,379)	(160)
Fair Value, Twelve months or more	23,873	2,808
Total, Gross Unrealized Losses	(75,879)	(2,914)
Total, Fair Value	$ 1,005,119	$ 316,084
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	2
Gross Unrealized Losses, Less than twelve months	$ (45)
Fair Value, Less than twelve months	3,955
Total, Gross Unrealized Losses	(45)
Total, Fair Value	$ 3,955
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	371	46
Gross Unrealized Losses, Less than twelve months	$ (11,696)	$ (1,797)
Fair Value, Less than twelve months	189,031	107,026
Gross Unrealized Losses, Twelve months or more	(164)	(160)
Fair Value, Twelve months or more	1,924	2,808
Total, Gross Unrealized Losses	(11,860)	(1,957)
Total, Fair Value	$ 190,955	$ 109,834
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	399	29
Gross Unrealized Losses, Less than twelve months	$ (38,127)	$ (268)
Fair Value, Less than twelve months	286,459	30,170
Gross Unrealized Losses, Twelve months or more	(4,987)
Fair Value, Twelve months or more	13,878
Total, Gross Unrealized Losses	(43,114)	(268)
Total, Fair Value	$ 300,337	$ 30,170
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	1
Gross Unrealized Losses, Less than twelve months	$ (5,432)	$ (1)
Fair Value, Less than twelve months	54,336	499
Total, Gross Unrealized Losses	(5,432)	(1)
Total, Fair Value	$ 54,336	$ 499
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	58	22
Gross Unrealized Losses, Less than twelve months	$ (15,200)	$ (688)
Fair Value, Less than twelve months	447,465	175,581
Gross Unrealized Losses, Twelve months or more	(228)
Fair Value, Twelve months or more	8,071
Total, Gross Unrealized Losses	(15,428)	(688)
Total, Fair Value	$ 455,536	$ 175,581