Earnings Per Limited Partner Units (Tables)

12 Months Ended

Sep. 30, 2012

Earnings Per Limited Partner Units [Abstract]

Net income allocation and per unit data

Basic and Diluted Earnings Per Limited Partner: (in thousands, except per unit data)	Years Ended September 30,
	2012		2011		2010
Net income	$	25,989	$	24,344	$	28,320
Less General Partners’ interest in net income		136		115		128
Net income available to limited partners		25,853		24,229		28,192
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60 *		1,142		574		1,258
Limited Partner’s interest in net income under FASB ASC 260-10-45-60	$	24,711	$	23,655	$	26,934
Per unit data:
Basic and diluted net income available to limited partners	$	0.42	$	0.36	$	0.40
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60 *		0.02		0.01		0.02
Limited Partner’s interest in net income under FASB ASC 260-10-45-60	$	0.40	$	0.35	$	0.38
Weighted average number of Limited Partner units outstanding		61,931		66,822		70,019