Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Income Tax Contingency [Line Items]
Income tax provision	$ 4,055	$ 1,757	$ 7,992	$ 5,182
Effective tax rate	36.80%	22.10%	35.90%	28.00%