Restructuring and Separation Costs (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Sep. 30, 2016
Restructuring Cost And Reserve [Line Items]
Separation costs	$ 400				$ 1,900
Restructuring costs related to termination of Canadian facility lease and write-off of associated leasehold improvements	300		$ 800		800
Restructuring and separation costs	647	$ 3,800	1,406	$ 7,703	2,738
Remaining restructuring costs additional headcount reductions			$ 600		$ 600
Restructuring and separation costs paid				5,300
Restructuring and separation costs payable over the next fifteen months	$ 2,400			$ 2,400
Scenario, Forecast
Restructuring Cost And Reserve [Line Items]
Restructuring and separation costs						$ 7,700