Borrowings - Federal Home Loan Bank Advances (Details) - USD ($)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Balance at year end	$ 175,000,000
Average daily balance during the year	$ 171,142,000
Average interest rate during the year	3.26%
Maximum month-end balance during the year	$ 540,000,000
Weighted average interest rate at year-end	4.44%
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Total borrowing capacity remaining	$ 1,270,240,000	$ 1,233,254,000
Collateral securing line of credit	2,673,464,000	2,717,967,000
Borrowings	415,677,000	171,778,000
Advances		0
FHLB Overnight
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]
Borrowings		$ 0
Advances	$ 175,000,000

Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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The calculated average balance outstanding for the year for all Federal Home Loan Bank advances as of the Balance Sheet date.

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The calculated weighted average interest rate for Federal Home Loan Bank advances for the period ended as of the Balance Sheet date.

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The maximum balance outstanding at any month end during the period as of the Balance Sheet date.

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Amount of advances from the Federal Home Loan Bank (FHLB).

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Weighted average interest rate on advances made and reported by Federal Home Loan Bank (FHLBank).

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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