CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 69,580	$ 25,269	$ 97,631
Other comprehensive income (loss):
Adjustment to pension liability, net of tax	(1,085)	13,106	(5,585)
Foreign currency translation	(2,017)	974	10,877
Net unrealized gain (loss) on available-for-sale securities, net of tax		(2)
Change in net unrealized gains/losses from cash flow hedges:
Change in fair value of cash flow hedges, net of tax	748	2,977	(4,217)
Adjustment for net gains/losses realized and included in net income, net of tax	(215)	800	4,459
Total change in net unrealized gains/losses from cash flow hedges, net of tax	533	3,777	242
Total other comprehensive income (loss)	(2,569)	17,855	5,534
Total comprehensive income	$ 67,011	$ 43,124	$ 103,165