Fair Value - Summary of Carrying Value and Fair Value of Company's Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financial Assets
Debt securities held to maturity	$ 261,369	$ 357,949
Loans, net	5,163,250	4,792,791
Quoted Prices in Active Markets for Identical Assets
Financial Assets
Debt securities held to maturity	0	0
Time deposits with other banks	0	0
Loans, net	0	0
Financial Liabilities
Deposits	0	0
Federal Home Loan Bank (FHLB) borrowings	0	0
Subordinated debt	0	0
Significant Other Observable Inputs
Financial Assets
Debt securities held to maturity	262,213	349,895
Time deposits with other banks	0	0
Loans, net	0	0
Financial Liabilities
Deposits	0	0
Federal Home Loan Bank (FHLB) borrowings	0	0
Subordinated debt	64,017	61,224
Significant Other Unobservable Inputs
Financial Assets
Debt securities held to maturity	0	0
Time deposits with other banks	3,744	8,132
Loans, net	5,139,491	4,835,248
Financial Liabilities
Deposits	5,584,621	5,172,098
Federal Home Loan Bank (FHLB) borrowings	314,995	380,027
Subordinated debt	0	0
Carrying Amount
Financial Assets
Debt securities held to maturity	261,369	357,949
Time deposits with other banks	3,742	8,243
Loans, net	5,158,127	4,784,201
Financial Liabilities
Deposits	5,584,753	5,177,240
Federal Home Loan Bank (FHLB) borrowings	315,000	380,000
Subordinated debt	$ 71,085	$ 70,804

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Amount of interest-bearing funds deposited into another Federal Home Loan Banks (FHLBanks).

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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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-Publisher FASB
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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Amount of investment in debt security measured at amortized cost (held-to-maturity).

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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