Loans Held for Investment (LHFI) and Allowance for Loan Losses, LHFI - Additional Information (Details 1) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) Region	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Accrued interest receivable	$ 30,600		$ 26,700
Maximum concentration of loan as a percentage of total LHFI	10.00%
Key market regions | Region	5
LHFI classified as TDRs	$ 19,900	$ 25,100
LHFI classified as TDRs from credits with interest only payments and credits renewed at a rate that was not commensurate with that of new debt with similar risk	17,800	16,400
Unused commitments on TDRs	271	2,000
Financing receivable, related allowance	1,700	3,900
Financing receivable, related charge-offs	$ 9	$ 3,700