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Investment in Securities (Schedule of Amortized Cost and Fair Value of Investment Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Amortized Cost, Due in 1 year or less	$ 61,709
Amortized Cost, Due after 1 year through 5 years	80,027
Amortized Cost, Due after 5 years through 10 years	199,491
Amortized Cost, Due after 10 years	33,193
Amortized Cost, Total	374,420
Fair Value, Due in 1 year or less	62,498
Fair Value, Due after 1 year through 5 years	82,183
Fair Value, Due after 5 years through 10 years	209,364
Fair Value, Due after 10 years	33,949
Fair Value, Total	$ 387,994	$ 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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