Investments - Gross Unrealized Losses - Tabular Disclosure (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	$ (26,805)	$ (2,754)
Fair Value, Less than twelve months	858,977	313,276
Gross Unrealized Losses, Twelve months or more	(1,086)	(160)
Fair Value, Twelve months or more	9,535	2,808
U.S. Government Agencies [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(258)
Fair Value, Less than twelve months	7,837
Mortgage-Backed Securities [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(10,795)	(1,797)
Fair Value, Less than twelve months	245,781	107,026
Gross Unrealized Losses, Twelve months or more	(1,086)	(160)
Fair Value, Twelve months or more	9,535	2,808
States and Political Subdivisions [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(10,053)	(268)
Fair Value, Less than twelve months	172,561	30,170
Corporate Bond [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(1,396)	(1)
Fair Value, Less than twelve months	40,360	499
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]
Gross Unrealized Losses, Less than twelve months	(4,303)	(688)
Fair Value, Less than twelve months	$ 392,438	$ 175,581