Fair Value of Financial Instruments - Summary of Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and due from banks	$ 593,508	$ 249,711
Interest–earning time deposits	4,782	8,965
Investment securities, held to maturity	1,552,443	168,676
Loans held for sale	12,579	13,538
Loans (excluding loan level hedges), net	3,553,345	3,810,356
Stock in FHLB	24,440	23,023
Interest receivable	26,137	21,396
Liabilities
Non–interest bearing deposits	1,360,338	1,053,242
Interest bearing deposits	4,442,653	3,477,891
Borrowings	675,753	475,000
Interest payable	2,235	2,712
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Cash and due from banks	593,508	249,711
Interest–earning time deposits	0	0
Investment securities, held to maturity	0	0
Loans held for sale	0	0
Loans (excluding loan level hedges), net	0	0
Stock in FHLB	0	0
Interest receivable	0	0
Liabilities
Non–interest bearing deposits	1,360,338	1,053,242
Interest bearing deposits	0	0
Borrowings	0	0
Subordinated notes	0	0
Junior subordinated debentures issued to capital trusts	0	0
Interest payable	0	0
Significant Other Observable Inputs (Level 2)
Assets
Cash and due from banks	0	0
Interest–earning time deposits	4,861	9,136
Investment securities, held to maturity	1,513,520	179,990
Loans held for sale	0	0
Loans (excluding loan level hedges), net	0	0
Stock in FHLB	24,440	23,023
Interest receivable	26,137	21,396
Liabilities
Non–interest bearing deposits	0	0
Interest bearing deposits	4,369,011	3,466,522
Borrowings	671,289	483,245
Subordinated notes	57,906	57,626
Junior subordinated debentures issued to capital trusts	53,420	52,676
Interest payable	2,235	2,712
Significant Unobservable Inputs (Level 3)
Assets
Cash and due from banks	0	0
Interest–earning time deposits	0	0
Investment securities, held to maturity	46,471	0
Loans held for sale	12,579	13,538
Loans (excluding loan level hedges), net	3,462,443	3,767,348
Stock in FHLB	0	0
Interest receivable	0	0
Liabilities
Non–interest bearing deposits	0	0
Interest bearing deposits	0	0
Borrowings	0	0
Subordinated notes	0	0
Junior subordinated debentures issued to capital trusts	0	0
Interest payable	0	0
Carrying Amount
Assets
Cash and due from banks	593,508	249,711
Interest–earning time deposits	4,782	8,965
Investment securities, held to maturity	1,552,443	168,676
Loans held for sale	12,579	13,538
Loans (excluding loan level hedges), net	3,553,345	3,810,356
Stock in FHLB	24,440	23,023
Interest receivable	26,137	21,396
Liabilities
Non–interest bearing deposits	1,360,338	1,053,242
Interest bearing deposits	4,442,653	3,477,891
Borrowings	675,753	475,000
Subordinated notes	58,750	58,603
Junior subordinated debentures issued to capital trusts	56,785	56,548
Interest payable	$ 2,235	$ 2,712

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For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks.

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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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