Fair Value Measurements - Fair Value on Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Financial assets:
Debt securities available for sale, at fair value	$ 1,093,557	$ 1,328,634
Debt securities held to maturity	357,177	370,391
Equity securities, at fair value	4,079	3,384
Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	423,249	179,228
Debt securities available for sale, at fair value	137,800	55,178
Debt securities held to maturity	0	0
Equity securities, at fair value	3,758	3,053
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, at fair value	946,020	1,261,333
Debt securities held to maturity	357,177	370,391
Equity securities, at fair value	321	331
Federal Home Loan Bank stock	81,022	58,114
Loans receivable, net	0	0
Derivative assets	18,898	19,756
Financial liabilities:
Deposits	7,828,259	7,942,782
Borrowings	1,531,179	1,146,265
Derivative liabilities	25,025	19,072
Significant Unobservable Inputs (Level 3)
Financial assets:
Cash and cash equivalents	0	0
Debt securities available for sale, at fair value	9,737	12,123
Debt securities held to maturity	0	0
Equity securities, at fair value		0
Federal Home Loan Bank stock	0	0
Loans receivable, net	7,366,184	6,771,095
Derivative assets	0	0
Financial liabilities:
Deposits	0	0
Borrowings	0	0
Derivative liabilities	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	423,249	179,228
Debt securities available for sale, at fair value	1,093,557	1,328,634
Debt securities held to maturity	401,154	421,523
Equity securities, at fair value	4,079	3,384
Federal Home Loan Bank stock	81,022	58,114
Loans receivable, net	7,819,441	7,624,761
Derivative assets	18,898	19,756
Financial liabilities:
Deposits	7,846,556	8,001,159
Borrowings	1,528,695	1,127,047
Derivative liabilities	25,025	19,072
Total Fair Value
Financial assets:
Cash and cash equivalents	423,249	179,228
Debt securities available for sale, at fair value	1,093,557	1,328,634
Debt securities held to maturity	357,177	370,391
Equity securities, at fair value	4,079	3,384
Federal Home Loan Bank stock	81,022	58,114
Loans receivable, net	7,366,184	6,771,095
Derivative assets	18,898	19,756
Financial liabilities:
Deposits	7,828,259	7,942,782
Borrowings	1,531,179	1,146,265
Derivative liabilities	$ 25,025	$ 19,072