Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial assets:
Debt securities available for sale	$ 1,187,440	$ 1,093,557
Debt securities held to maturity	351,991	357,177
Equity securities	4,430	4,079
Derivative assets	25,346	18,898
Financial liabilities:
Derivative liabilities	18,142	25,025
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	373,472	423,249
Debt securities available for sale	229,844	137,800
Debt securities held to maturity	0	0
Equity securities	4,107	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	947,685	946,020
Debt securities held to maturity	351,991	357,177
Equity securities	323	321
Federal Home Loan Bank stock	80,859	81,022
Loans receivable, net	0	0
Derivative assets	25,346	18,898
Financial liabilities:
Deposits	7,811,709	7,828,259
Borrowings	1,527,514	1,531,179
Derivative liabilities	18,142	25,025
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale	9,911	9,737
Debt securities held to maturity	0	0
Equity securities	0	0
Federal Home Loan Bank stock	0	0
Loans receivable, net	7,229,292	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	373,472	423,249
Debt securities available for sale	1,187,440	1,093,557
Debt securities held to maturity	398,351	401,154
Equity securities	4,430	4,079
Federal Home Loan Bank stock	80,859	81,022
Loans receivable, net	7,760,228	7,819,441
Derivative assets	25,346	18,898
Financial liabilities:
Deposits	7,829,403	7,846,556
Borrowings	1,530,424	1,528,695
Derivative liabilities	18,142	25,025
Total Fair Value
Financial assets:
Cash and cash equivalents	373,472	423,249
Debt securities available for sale	1,187,440	1,093,557
Debt securities held to maturity	351,991	357,177
Equity securities	4,430	4,079
Federal Home Loan Bank stock	80,859	81,022
Loans receivable, net	7,229,292	7,366,184
Derivative assets	25,346	18,898
Financial liabilities:
Deposits	7,811,709	7,828,259
Borrowings	1,527,514	1,531,179
Derivative liabilities	$ 18,142	$ 25,025