Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Net income	$ 29,906		$ 25,989		$ 24,344
Other comprehensive income:
Unrealized gain on pension plan obligation	6,337	[1]	1,176	[1]	171	[1]
Tax effect of unrealized gain on pension plan obligation	(2,577)		(480)		(167)
Total other comprehensive income	3,760		696		4
Total comprehensive income	$ 33,666		$ 26,685		$ 24,348

[1] These items are included in the computation of net periodic pension cost. See Note 12-Employee Benefit Plan.