Interest Rate Swap Agreements - Summary of variable rates received and fixed rates paid under swap (Details 1) - Interest Rate Swap	3 Months Ended
Jun. 30, 2016	Jun. 30, 2015
Derivative [Line Items]
Variable rate received	0.44%	0.18%
Fixed rate paid	0.94%	0.94%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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