For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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The amounts in accumulated other comprehensive income related to gains and losses that are not recognized immediately and are expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.

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Employee Benefit Plans (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Employer contribution for defined contribution plans	$ 1,699	$ 1,319	$ 791
Required service period	10 years
Ultimate health care cost trend rate	6.00%	6.00%
Accumulated benefit obligation	32,374	36,436
Other benefits recognized net actuarial gain	14
Target allocation percentage	50.00%
Employees Younger Than Sixty-Five [Member]
Defined Benefit Plan Disclosure [Line Items]
Ultimate health care cost trend rate	6.00%
Employees Aged Sixty-Five Or Older [Member]
Defined Benefit Plan Disclosure [Line Items]
Ultimate health care cost trend rate	5.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Recognized net actuarial loss	1
Scenario, Forecast [Member] \| Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Recognized net actuarial loss	$ 189