INVESTMENT SECURITIES (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Trading Securities [Abstract]
Net unrealized gains on trading securities	$ 1,100,000
Realized gains	909,000
Available-for-sale Securities [Abstract]
Other-than-temporary impairment losses recognized in earnings	74,000
The Bancorp, Inc. [Member]
Trading Securities [Abstract]
Number of shares sold that were held in trust (in shares)	33,509	90,210
Realized gains	22,000	186,000
Unrealized trading gain		16,000
Available-for-sale Securities [Abstract]
Other-than-temporary impairment losses recognized in earnings			329,000
The Bancorp, Inc. [Member] | Supplemental Employee Retirement Plan [Member] | Chief Executive Officer [Member]
Trading Securities [Abstract]
Number of shares sold that were held in trust (in shares)	33,509	33,509
Stock shares held in trust, value		240,000
Realized gains	22,000
Equity securities [Member] | The Bancorp, Inc. [Member]
Equity Securities [Abstract]
Number of shares held (in shares)	18,972
CDO securities [Member]
CDO securities [Abstract]
Number of CDO issuers that represent the retained equity interest	4	3
Available-for-sale Securities [Abstract]
Other-than-temporary impairment losses recognized in earnings	74,000	0	480,000
CDO securities [Member] | Apidos CLO II [Member]
CDO securities [Abstract]
Minimum investment requirement	$ 2,000,000