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Fair Value of FInancial Instruments (Other Investments - Lifeshield) (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Feb. 28, 2019
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2018
Fair Value, Financial Instruments Measured on a Recurring Basis [Line Items]        
Other investment, proceeds   $ 14,705 $ 5,415  
Lifeshield [Member]        
Fair Value, Financial Instruments Measured on a Recurring Basis [Line Items]        
Fair value investment, carrying amount       $ 10,000
Fair value investment, ownership percentage       40.00%
Other investment, proceeds $ 11,000