Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial assets:
Debt securities available for sale	$ 1,263,459	$ 1,093,557
Debt securities held to maturity	365,344	357,177
Equity securities	4,531	4,079
Derivative assets	26,189	18,898
Financial liabilities:
Derivative liabilities	18,132	25,025
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	391,114	423,249
Debt securities available for sale	263,640	137,800
Debt securities held to maturity	0	0
Equity securities	4,209	3,758
Federal Home Loan Bank stock	0	0
Loans receivable, net	0	0
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Significant Other Observable Inputs (Level 2)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale	990,078	946,020
Debt securities held to maturity	365,344	357,177
Equity securities	322	321
Federal Home Loan Bank stock	87,618	81,022
Loans receivable, net	0	0
Derivative assets	26,189	18,898
Financial liabilities:
Deposits	7,764,824	7,828,259
Borrowings	1,679,284	1,531,179
Derivative liabilities	18,132	25,025
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale	9,741	9,737
Debt securities held to maturity	0	0
Equity securities	0	0
Federal Home Loan Bank stock	0	0
Loans receivable, net	7,189,901	7,366,184
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	391,114	423,249
Debt securities available for sale	1,263,459	1,093,557
Debt securities held to maturity	411,300	401,154
Equity securities	4,531	4,079
Federal Home Loan Bank stock	87,618	81,022
Loans receivable, net	7,761,949	7,819,441
Derivative assets	26,189	18,898
Financial liabilities:
Deposits	7,781,547	7,846,556
Borrowings	1,683,899	1,528,695
Derivative liabilities	18,132	25,025
Total Fair Value
Financial assets:
Cash and cash equivalents	391,114	423,249
Debt securities available for sale	1,263,459	1,093,557
Debt securities held to maturity	365,344	357,177
Equity securities	4,531	4,079
Federal Home Loan Bank stock	87,618	81,022
Loans receivable, net	7,189,901	7,366,184
Derivative assets	26,189	18,898
Financial liabilities:
Deposits	7,764,824	7,828,259
Borrowings	1,679,284	1,531,179
Derivative liabilities	$ 18,132	$ 25,025