Other Investments (Schedule of Maturities of Investments in Debt Securities) (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Other Investments [Abstract]
Amortized Cost, Due in one year or less	$ 15,362
Amortized Cost, Due after one year through five years	23,252
Amortized Cost, Due after five years through ten years
Amortized Cost, Due after ten years
Amortized Cost	38,614
Fair Value, Due in one year or less	15,362
Fair Value, Due after one year through five years	25,003
Fair Value, Due after five years through ten years
Fair Value, Due after ten years
Fair Value	$ 40,365