CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 9,752	$ 2,931
Other comprehensive income:
Unrealized gain on pension plan obligation	664	688
Tax effect of unrealized gain on pension plan	(271)	(281)
Total other comprehensive income	393	407
Total comprehensive income	$ 10,145	$ 3,338