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Long-Term Debt Line of Credit (Details) - USD ($)
$ in Thousands
Nov. 04, 2015
Sep. 30, 2015
Mar. 31, 2015
Line of Credit Facility [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 750,000 $ 750,000
Revolving Credit Facility [Member]      
Line of Credit Facility [Line Items]      
Line of Credit Facility, Fair Value of Amount Outstanding $ 40,000