Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income from continuing operations before income tax provision									$ 8,356		$ 13,846	$ 9,168
Income tax benefit (expense)									(2,753)		(4,088)	(2,861)
Net income	743	1,907	1,426	947	2,906	2,478	1,435	3,415	5,023		10,234	6,548
Reclassification out of Accumulated Other Comprehensive Income [Member] | Amortization of Retirement Plan Liability [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Prior service costs									0	[1]
Net actuarial loss									450	[1]
Settlements/curtailments									0	[1]
Income from continuing operations before income tax provision									450
Income tax benefit (expense)									(162)
Net income									$ 288

[1] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost. See Note 7 - Retirement benefit plans for further information.