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Indebtedness (Maturities of Long-term Debt) (Details)
$ in Thousands
Jun. 30, 2015
USD ($)
Indebtedness [Abstract]  
2016 $ 3,364
2017
2018 $ 660,000
2019 325,000
Long-term debt before debt premium 988,364
Add: Debt premium 29,459
Total debt $ 1,017,823