Other Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Accrued expenses	$ 361,839	$ 337,695
Accrued interest payable	48,302	59,102
Accounts payable	92,715	89,339
Dividends payable	44,869	44,741
Trades payable	45	31
Liability for GNMA loans sold with an option to repurchase	9,538	10,960
Reserves for loan indemnifications	4,542	4,408
Reserve for operational losses	25,209	27,994
Operating lease liabilities	121,333	126,946
Finance lease liabilities	24,897	25,778
Pension benefit obligation	6,696	6,772
Postretirement benefit obligation	115,421	117,045
Other liabilities	63,042	63,816
Total other liabilities	$ 918,448	$ 914,627
Operating Lease Liability Statement Of Financial Position	Other liabilities	Other liabilities
Finance Lease Liability Statement Of Financial Position	Other liabilities	Other liabilities