Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended				24 Months Ended
	May 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2013	Dec. 31, 2015
Significant Accounting Policies [Line Items]
Risk-sharing arrangement term						10 years
SPE, assets		$ 30,000	$ 34,000
SPE, liabilities		$ 6,000	7,000
Incentive Plan, mandatory holding period before awards vest	3 years
Employee Stock Purchase Plan, percentage of common stock fair value that employees can purchase					85.00%
Employees maximum 401(k) contribution		100.00%
Employer matching contributions		$ 2,000	1,000	$ 1,000
Borrowings		1,746,145	$ 1,650,576
BPL bridge loans
Significant Accounting Policies [Line Items]
Borrowings		745,000
Trust Preferred Securities and Subordinated Notes
Significant Accounting Policies [Line Items]
Borrowings		$ 139,500
Minimum
Significant Accounting Policies [Line Items]
Business purpose loans term		3 years
Business purpose maturity loan term		12 years
Percentage of losses assumed on pool of loans sold						1.00%
Incentive Plan, awards vesting period (in years)	3 years
Maximum
Significant Accounting Policies [Line Items]
Business purpose loans term		30 years
Business purpose maturity loan term		36 months
Percentage of losses assumed on pool of loans sold						2.25%
Incentive Plan, awards vesting period (in years)	4 years