Income Taxes (Tax Expense and Effective Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Taxes
Earnings before income taxes	$ 35,497	$ 37,708	$ 124,370	$ 131,922
Income tax expense	$ 11,834	$ 9,406	$ 30,893	$ 36,452
Effective tax rate	33.30%	24.90%	24.80%	27.60%