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Basis of Presentation and Significant Accounting Policies (Details) - USD ($)
3 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Mar. 31, 2016
Dec. 31, 2007
Subsidiary, Sale of Stock [Line Items]        
Amounts outstanding under guarantee $ 111,287,000 $ 165,222,000 $ 107,615,000  
Value added tax expense $ 6,185,000 5,675,000    
MTC        
Subsidiary, Sale of Stock [Line Items]        
Investment, cost method       $ 0
Amounts outstanding under guarantee   $ 51,349,000