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Segment Information Segment Information (Tables)
12 Months Ended
Mar. 31, 2015
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
 
 
2015
 
2014
 
2013
OPERATING REVENUES
 
 
 
 
 
 
United States
 
$
1,977,975

 
$
1,874,328

 
$
1,800,539

United Kingdom
 
398,729

 
436,542

 
387,966

Other International
 
442,402

 
430,887

 
424,145

Total
 
$
2,819,106

 
$
2,741,757

 
$
2,612,650

INTANGIBLE ASSETS, NET AND GOODWILL
 
 
 
 
 
 
United States
 
$
3,135,226

 
$
3,127,654

 
$
3,139,050

United Kingdom
 
1,062,332

 
879,946

 
895,767

Other International
 
455,286

 
404,696

 
411,910

Total
 
$
4,652,844

 
$
4,412,296

 
$
4,446,727