Consolidated Statements of Comprehensive Income (Loss) Statement - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (2,872)	$ 5,023	$ 10,234
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment, net of tax $0, $0, and $0, respectively	120	0	(284)
Retirement plan liability adjustment, net of tax $850, $502, and $1,712, respectively	(1,500)	(891)	2,854
Interest rate swap agreement adjustment, net of tax $0, ($14), and $16, respectively	5	21	31
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax	0	0	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, before Reclassification Adjustments, Tax	850	502	1,712
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	0	(14)	16
Comprehensive income (loss)	$ (4,247)	$ 4,153	$ 12,835