Parent Company Only Financial Statements - Condensed - Statements of Financial Condition (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 139,365	$ 1,279,259
Other assets	205,574	144,126
Total assets	14,113,324	14,501,508
Liabilities:
Debentures payable	129,314	129,054
Other liabilities	182,126	178,664
Total liabilities	12,621,838	12,917,937
Shareholders’ equity	1,491,486	1,583,571	$ 1,538,703	$ 1,353,285
Total liabilities and shareholders’ equity	14,113,324	14,501,508
Parent Company
Assets
Cash and cash equivalents	174,102	128,001
Investment in bank subsidiary	1,656,159	1,674,360
Other assets	9,490	9,199
Total assets	1,839,751	1,811,560
Liabilities:
Debentures payable	243,154	252,629
Other liabilities	2,109	1,814
Total liabilities	245,263	254,443
Shareholders’ equity	1,594,488	1,557,117
Total liabilities and shareholders’ equity	$ 1,839,751	$ 1,811,560