Supplemental Disclosure for Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Supplemental disclosures of cash flow information:
Interest paid	$ 207,334	$ 194,297
Net income taxes paid	7,208	320
Operating cash flows from operating leases	12,499	13,417
Operating cash flows from finance leases	140	159
Financing cash flows from finance leases	414	386
Supplemental schedule of noncash activities:
Transfer of loans and loans held for sale to OREO	5,735	6,534
Transfer of loans to loans held for sale	0	1,196,883
Right-of-use assets obtained in exchange for lease obligations- operating leases	17,568	22,108
Cash and cash equivalents	5,513,268	6,008,461	$ 6,938,698
Restricted cash in other assets	306,798	131,378
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 5,820,066	$ 6,139,839	$ 7,156,689	$ 3,501,380