Basis of Presentation - Restatement on Consolidated Statements of Financial Condition (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Other assets	$ 209,014			$ 179,084
Total assets	8,579,375			8,422,946
Other liabilities	187,268			161,349
Total liabilities	7,912,854			7,745,789
Retained earnings	548,058			547,507
Total stockholders' equity	666,521	$ 670,247	$ 672,345	677,157	$ 670,719	$ 670,812	$ 675,813	$ 679,628
Total liabilities and stockholders' equity	8,579,375			$ 8,422,946
As Reported
Other assets	206,922
Total assets	8,577,283
Other liabilities	182,556
Total liabilities	7,908,142
Retained earnings	550,678
Total stockholders' equity	669,141
Total liabilities and stockholders' equity	8,577,283
Adjustments
Other assets	2,092
Total assets	2,092
Other liabilities	4,712
Total liabilities	4,712
Retained earnings	(2,620)
Total stockholders' equity	(2,620)
Total liabilities and stockholders' equity	$ 2,092