Supplemental Disclosure for Statement of Cash Flows (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Supplemental disclosures of cash flow information:
Interest paid	$ 384,843	$ 464,281
Net income taxes paid	33,904	68,758
Operating cash flows from operating leases	25,212	26,993
Operating cash flows from finance leases	275	313
Financing cash flows from finance leases	836	779
Supplemental schedule of noncash activities:
Transfer of loans and loans held for sale to OREO	5,735	15,713
Transfer of loans to loans held for sale	0	1,196,883
Right-of-use assets obtained in exchange for lease obligations- operating leases	24,800	24,717
Cash and cash equivalents	12,757,190	5,801,161	$ 6,938,698
Restricted cash in other assets	306,798	145,212
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 13,063,988	$ 5,946,373	$ 7,156,689	$ 3,501,380