Condensed Financial Statements of BankUnited, Inc. (Schedule of Condensed Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Assets:
Cash and cash equivalents	$ 267,500	$ 187,517	$ 252,749	$ 495,353
Investment securities available for sale, at fair value	4,859,539	4,585,694
Deferred tax asset, net	105,577	117,215
Other assets	335,074	225,062
Total assets	23,883,467	19,210,529
Liabilities and Stockholders' Equity:
Liabilities	21,639,569	17,157,995
Stockholders' equity	2,243,898	2,052,534	1,928,698	1,806,680
Total liabilities and stockholders' equity	23,883,467	19,210,529
Parent Company [Member]
Assets:
Cash and cash equivalents	82,810	178,444	$ 132,293	$ 52,989
Investment securities available for sale, at fair value	79,384	126,888
Investment in subsidiaries	2,475,629	1,747,992
Deferred tax asset, net	15,336	14,534
Other assets	10,948	8,593
Total assets	2,664,107	2,076,451
Liabilities and Stockholders' Equity:
Notes Payable	392,326	0
Liabilities	27,883	23,917
Stockholders' equity	2,243,898	2,052,534
Total liabilities and stockholders' equity	$ 2,664,107	$ 2,076,451