Defined Benefit Pension Plan (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Level 1
Defined benefit pension plan
Fair values	$ 132	$ 150
Level 2
Defined benefit pension plan
Fair values	21,874	19,170
Total
Defined benefit pension plan
Fair values	22,006	19,320
Equity securities: | Level 2
Defined benefit pension plan
Fair values	10,871
Equity securities: | Total
Defined benefit pension plan
Fair values	10,871
International equity | Level 2
Defined benefit pension plan
Fair values		9,115
International equity | Total
Defined benefit pension plan
Fair values		9,115
Fixed-income securities | Level 2
Defined benefit pension plan
Fair values	11,003	10,055
Fixed-income securities | Total
Defined benefit pension plan
Fair values	11,003	10,055
Cash equivalents | Level 1
Defined benefit pension plan
Fair values	132	150
Cash equivalents | Total
Defined benefit pension plan
Fair values	$ 132	$ 150