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Restructuring Costs Restructuring costs (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Restructuring Costs [Line Items]    
Restructuring and impairment costs [1] $ 0 $ 2,389
[1] Restructuring and impairment costs are excluded from segment operating income (loss), but are included in consolidated operating income (loss) in the consolidated statements of income and comprehensive income.