Fair Value Measurements (Fair Value of Assets Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Assets:
Cash equivalents	$ 334	$ 10,535
Deferred compensation	5,116	3,526
Liabilities:
Deferred compensation	4,791	3,688
Fair Value, Inputs, Level 1
Assets:
Cash equivalents	334	10,535
Deferred compensation	1,992	724
Fair Value, Inputs, Level 2
Assets:
Deferred compensation	3,124	2,802
Liabilities:
Deferred compensation	$ 4,791	$ 3,688