Restructuring and Separation Costs (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Restructuring And Related Activities [Abstract]
Restructuring and separation costs	$ 3,259	$ 3,800	$ 1,332	$ 7,056	$ 1,332
Restructuring and separation costs paid				3,500
Restructuring and separation costs payable over the next nine months	$ 3,600			$ 3,600