CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 19,981	$ 92,104	$ 83,904
Other comprehensive income (loss):
Adjustment to pension liability, net of tax	13,501	(5,585)	(3,285)
Foreign currency translation	494	10,688	(1,250)
Net unrealized gain (loss) from cash flow hedges, net of tax	3,777	242	(5,618)
Net unrealized loss on available-for-sale securities, net of tax	(2)
Total other comprehensive income (loss)	17,770	5,345	(10,153)
Total comprehensive income	$ 37,751	$ 97,449	$ 73,751