Fair Value Measurements - Assets and liabilities recorded at fair value on recurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	$ 6,734	$ 47,218
Liabilities measured at a fair value	30,067	5,194
Recurring | Derivative Financial Instruments, Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets measured at a fair value	1,636,532	2,676,459
Derivative Financial Instruments, Liability | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	2	47
Interest Rate Caps | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	31,039	5,197
Derivative liability	30,065	5,147
Interest Rate Swap | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0	0
U.S. treasury bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	46,327	49,458
U.S. treasury bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	46,326	49,458
U.S. agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	669,728	622,387
U.S. agency securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	669,728	622,387
Residential mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	820,503	1,618,027
Loans held for sale	6,734	47,218
Residential mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	820,502	1,677,673
Corporate mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	50,214
US states and political subdivisions debt securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	10,088	145,431
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	1,808	128,459
Corporate bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	1,808	128,459
Mortgage banking derivatives | Recurring | Derivative Financial Instruments, Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	93	636
Fair Value, Inputs, Level 1 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0	0
Assets measured at a fair value	0	0
Derivative liability		0
Liabilities measured at a fair value	0	0
Fair Value, Inputs, Level 1 | Derivative Financial Instruments, Liability
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0
Fair Value, Inputs, Level 1 | Interest Rate Caps | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Fair Value, Inputs, Level 1 | Interest Rate Swap | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0	0
Fair Value, Inputs, Level 1 | U.S. treasury bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 1 | U.S. agency securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 1 | Residential mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 1 | Corporate mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0
Fair Value, Inputs, Level 1 | US states and political subdivisions debt securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 1 | Corporate bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 1 | Mortgage banking derivatives | Recurring | Derivative Financial Instruments, Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Fair Value, Inputs, Level 2 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	6,734	47,218
Assets measured at a fair value	1,636,439	2,665,823
Derivative liability		47
Liabilities measured at a fair value	30,067	5,194
Fair Value, Inputs, Level 2 | Derivative Financial Instruments, Liability | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	2
Fair Value, Inputs, Level 2 | Interest Rate Caps | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	31,039	5,197
Derivative liability	30,065	5,147
Fair Value, Inputs, Level 2 | Interest Rate Swap | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0	0
Fair Value, Inputs, Level 2 | U.S. treasury bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	46,326	49,458
Fair Value, Inputs, Level 2 | U.S. agency securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	669,728	622,387
Fair Value, Inputs, Level 2 | Residential mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	820,502	1,677,673
Fair Value, Inputs, Level 2 | Corporate mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	50,214
Fair Value, Inputs, Level 2 | US states and political subdivisions debt securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	10,088	145,431
Fair Value, Inputs, Level 2 | Corporate bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	1,808	118,459
Fair Value, Inputs, Level 2 | Mortgage banking derivatives | Recurring | Derivative Financial Instruments, Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Fair Value, Inputs, Level 3 | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0	0
Assets measured at a fair value	93	10,636
Derivative liability		0
Liabilities measured at a fair value	0	0
Fair Value, Inputs, Level 3 | Derivative Financial Instruments, Liability | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0
Fair Value, Inputs, Level 3 | Interest Rate Caps | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	0	0
Derivative liability	0	0
Fair Value, Inputs, Level 3 | Interest Rate Swap | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	0	0
Fair Value, Inputs, Level 3 | U.S. treasury bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 3 | U.S. agency securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 3 | Residential mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 3 | Corporate mortgage-backed securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0
Fair Value, Inputs, Level 3 | US states and political subdivisions debt securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	0
Fair Value, Inputs, Level 3 | Corporate bonds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale, at fair value, net of allowance for credit loss of $0 in 2021	0	10,000
Fair Value, Inputs, Level 3 | Mortgage banking derivatives | Recurring | Derivative Financial Instruments, Assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	$ 93	$ 636