Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Tax Contingency [Line Items]
Income tax provision	$ 5,185	$ 2,233	$ 10,573	$ 10,226
Effective tax rate	42.40%	43.10%	77.20%	37.30%
Operating loss carryforwards	$ 34,000		$ 34,000
Operating loss carryforwards, expiration period (in years)			20 years
Operating loss carryforwards, expiration date			2031
Operating loss carryforwards, valuation allowance	$ 9,000		$ 9,000
R&D Tax Credit
Income Tax Contingency [Line Items]
Tax credit carryforward description			The effective tax rate for the nine months ended June 30, 2015 was 77.2% compared to an effective tax rate of 37.3% for the nine months ended June 30, 2014. The higher rate for the nine months ended June 30, 2015 was primarily due to a valuation allowance against our Canadian deferred tax assets and the resulting inability to record a tax benefit against the year-to-date Canadian losses. This was partially offset by the release of a FIN 48 reserve related to the R&D Credit upon closing an IRS audit as well as the December 19, 2014 retroactive reinstatement of the R&D Credit from January 1, 2014 through December 31, 2014.
Tax credit expiration date			Dec. 31, 2014