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Disclosures about Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosures about Fair Value of Assets and Liabilities
Mortgage loans in process of securitization	$ 110,599	$ 154,194
Securities available for sale	1,113,687	323,337
Loans held for sale	86,663	82,192
Servicing rights	158,457	146,248	$ 110,348	$ 82,604
Interest rate swaps (back-to-back)
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	12,426	3,041
Derivative liabilities	12,426	3,041
Recurring
Disclosures about Fair Value of Assets and Liabilities
Mortgage loans in process of securitization	110,599	154,194
Loans held for sale	86,663	82,192
Servicing rights	158,457	146,248
Recurring \| Interest rate lock commitments
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	140	28
Derivative liabilities	4	23
Recurring \| Forward contracts
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	4	46
Derivative liabilities	391	52
Recurring \| Interest rate swaps
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	2,610	3,030
Derivative liabilities	12,426	3,041
Recurring \| Interest rate swaps (back-to-back)
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	12,426	3,041
Recurring \| Put Option
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	25,877
Recurring \| Interest Rate Floor
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	6,576
Level 2 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Mortgage loans in process of securitization	110,599	154,194
Loans held for sale	86,663	82,192
Level 2 \| Recurring \| Forward contracts
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	4	46
Derivative liabilities	391	52
Level 2 \| Recurring \| Interest rate swaps
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	2,610	3,030
Derivative liabilities	12,426	3,041
Level 2 \| Recurring \| Interest rate swaps (back-to-back)
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	12,426	3,041
Level 2 \| Recurring \| Put Option
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	7,223
Level 3 \| Interest rate lock commitments
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	140	28
Derivative liabilities	4	23
Level 3 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Servicing rights	158,457	146,248
Level 3 \| Recurring \| Interest rate lock commitments
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	140	28
Derivative liabilities	4	23
Level 3 \| Recurring \| Put Option
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	18,654
Level 3 \| Recurring \| Interest Rate Floor
Disclosures about Fair Value of Assets and Liabilities
Derivative assets	6,576
Treasury notes
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	128,968	36,280
Treasury notes \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	128,968	36,280
Treasury notes \| Level 1 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	128,968	36,280
Federal agencies
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	247,755	271,890
Federal agencies \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	247,755	271,890
Federal agencies \| Level 2 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	247,755	271,890
Mortgage-backed - Agency
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale		15,167
Mortgage-backed - Agency \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale		15,167
Mortgage-backed - Agency \| Level 2 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale		$ 15,167
Mortgage-backed - Government Agency ("Agency")
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	14,467
Mortgage-backed - Government Agency ("Agency") \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	14,467
Mortgage-backed - Government Agency ("Agency") \| Level 2 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	14,467
Mortgage-backed - Non-GSE \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	485,500
Mortgage-backed - Non-GSE \| Level 3 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	485,500
Mortgage-backed - Agency - fair value option
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	236,997
Mortgage-backed - Agency - fair value option \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	236,997
Mortgage-backed - Agency - fair value option \| Level 2 \| Recurring
Disclosures about Fair Value of Assets and Liabilities
Securities available for sale	$ 236,997