Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Effective tax rate		59.00%	36.00%	16.00%
Release of uncertain tax benefits	$ 600	$ 4,149
Undistributed earnings of foreign subsidiaries		18,400
Operating loss carryforwards		37,000
Operating loss carryforwards, valuation allowance		$ 9,300
Operating loss carryforwards, expiration period (in years)		20 years
Operating loss carryforwards, expiration date		2031
Tax benefit		$ 4,100