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Investments in Affiliates and Redeemable Noncontrolling Interests (Redeemable Noncontrolling Interest) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Investments in Affiliates and Redeemable Noncontrolling Interest [Abstract]        
Net Income (Loss) Attributable to Redeemable Noncontrolling Interest $ 1,000 $ 1,259 $ 1,000 $ 1,259
Redeemable Noncontrolling Interest [Roll Forward]        
Balance, beginning of year     3,000 3,000
Balance, end of year $ 4,000 $ 4,259 $ 4,000 $ 4,259