Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Taxes [Abstract]
Current Federal Tax Expense (Benefit)	$ 30,200	$ 25,535	$ 20,741
Current State and Local Tax Expense (Benefit)	4,952	4,494	3,696
Deferred Federal Income Tax Expense (Benefit)	1,652	1,308	628
Deferred State and Local Income Tax Expense (Benefit)	253	220	120
Federal, State, and Local Income Tax Expense (Benefit), Continuing Operations	37,057	31,557	25,185
Current Foreign Tax Expense (Benefit)	1,275	1,252	1,109
Deferred Foreign Income Tax Expense (Benefit)	(500)	(346)	(174)
Foreign Income Tax Expense (Benefit), Continuing Operations, Total	775	906	935
Total Income Tax Expense (Benefit)	$ 37,832	$ 32,463	$ 26,120