Document and Entity Information	6 Months Ended
Jun. 30, 2011	Aug. 05, 2011 Class A common stock [Member]	Aug. 05, 2011 Class B common stock [Member]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2011
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2011
Entity Registrant Name	BANKATLANTIC BANCORP INC
Entity Central Index Key	0000921768
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		77,158,495	975,225

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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