Condensed Financial Statements of BankUnited, Inc. (Schedule of Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets:
Cash and cash equivalents	$ 572,647	$ 314,857
Other assets	740,876	634,046
Total assets	37,026,712	35,815,396
Liabilities and Stockholders' Equity:
Other liabilities	750,474	514,117
Stockholders' equity	2,435,981	3,037,761	$ 2,983,012	$ 2,980,779
Total liabilities and stockholders' equity	37,026,712	35,815,396
Parent Company
Assets:
Cash and cash equivalents	266,282	164,212	$ 289,761	$ 204,589
Marketable Securities	90,884	120,777
Investment in subsidiaries	2,777,082	3,465,136
Other assets	39,682	6,673
Total assets	3,173,930	3,756,798
Liabilities and Stockholders' Equity:
Notes Payable	692,534	691,200
Other liabilities	45,415	27,837
Stockholders' equity	2,435,981	3,037,761
Total liabilities and stockholders' equity	$ 3,173,930	$ 3,756,798