Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Net income		$ 37,556	$ 36,084	$ 29,906
Other comprehensive income (loss):
Unrealized gain (loss) on pension plan obligation	[1],[2]	1,827	(1,070)	6,337
Tax effect of unrealized gain (loss) on pension plan obligation		(753)	463	(2,577)
Total other comprehensive income (loss)		1,074	(607)	3,760
Total comprehensive income		$ 38,630	$ 35,477	$ 33,666

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

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