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Investment in Securities (Schedule of Amortized Cost and Fair Value of Investment Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Due in 1 year or less	$ 49,435
Amortized Cost, Due after 1 year through 5 years	93,433
Amortized Cost, Due after 5 years through 10 years	172,368
Amortized Cost, Due after 10 years	29,725
Amortized Cost, Total	344,961
Fair Value, Due in 1 year or less	49,876
Fair Value, Due after 1 year through 5 years	98,084
Fair Value, Due after 5 years through 10 years	186,537
Fair Value, Due after 10 years	30,668
Fair Value, Total	$ 365,165	$ 422,665

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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