Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Assets:
Cash equivalents	$ 434	$ 10,535
Deferred compensation	4,783	3,526
Liabilities:
Deferred compensation	4,487	3,688
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	434	10,535
Deferred compensation	1,879	724
Fair Value, Inputs, Level 2
Assets:
Deferred compensation	2,904	2,802
Liabilities:
Deferred compensation	$ 4,487	$ 3,688