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Investments Investments (Aggregate Carrying And Approximate Market Values of Marketable and Non-Marketable Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Schedule of Investments [Line Items]    
Other Investments and Securities, at Cost $ 28,920 $ 14,147
Other Investment Not Readily Marketable, Fair Value 28,920 14,147
Federal Home Loan Bank Certificates and Obligations (FHLB) [Member]    
Schedule of Investments [Line Items]    
Securities Owned Not Readily Marketable 17,745 14,147
Security Owned Not Readily Marketable, Fair Value 17,745 $ 14,147
Equity Securities    
Schedule of Investments [Line Items]    
Equity Securities, FV-NI, Cost 11,175  
Equity Securities, FV-NI $ 11,175