SHAREHOLDERS' EQUITY (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Restricted Shares
Restricted Shares
Shares granted but not yet vested	580,180	491,705	391,580
Compensation expense	$ 758,000	$ 845,000	$ 833,000
Unearned compensation	$ 1,870,000
Remaining weighted average vesting period	2 years 7 months 6 days
Changes in number of shares outstanding under the BRT Incentive Plans
Outstanding at beginning of the year (in shares)	491,705	391,580	299,280
Issued (in shares)	136,650	138,150	125,150
Cancelled (in shares)	(7,250)	(175)	(2,050)
Vested (in shares)	(40,925)	(37,850)	(30,800)
Outstanding at the end of the year (in shares)	580,180	491,705	391,580
2012 Incentive Plan
Restricted Shares
Shares authorized for issuance	600,000
Prior Plans | Restricted Shares
Restricted Shares
Shares granted but not yet vested	583,030
Vesting period for shares issued	5 years
Changes in number of shares outstanding under the BRT Incentive Plans
Outstanding at the end of the year (in shares)	583,030