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Investment Securities (Amortized Cost and Estimated Fair Value by Maturity Date) (Details) $ in Thousands	Jun. 30, 2018 USD ($)
Investment Securities [Abstract]
Available for sale, Amortized Cost, Due in one year or less	$ 8,001
Available for sale, Amortized Cost, Due after one year through five years	34,608
Available for sale, Amortized Cost, Due after five years through ten years	51,945
Available for sale, Amortized Cost, Due after ten years	86,135
Available for sale, Amortized Cost, Debt maturities	180,689
Available for sale, Estimated Fair Value, Due in one year or less	7,975
Available for sale, Estimated Fair Value, Due after one year through five years	33,748
Available for sale, Estimated Fair Value, Due after five years through ten years	50,293
Available for sale, Estimated Fair Value, Due after ten years	83,550
Available for sale, Estimated Fair Value, Debt maturities	175,566
Held to maturity securities, Amortized Cost, Due after one year through five years	901
Held to maturity securities, Amortized Cost, Due after five years through ten years	3,501
Held to maturity securities, Amortized Cost, Due after ten years	1,766
Held to maturity securities, Amortized Cost, Debt maturities	6,168
Held to maturity securities, Estimated Fair Value, Due after one year through five years	918
Held to maturity securities, Estimated Fair Value, Due after five years through ten years	3,488
Held to maturity securities, Estimated Fair Value, Due after ten years	1,756
Held to maturity securities, Estimated Fair Value, Debt maturities	$ 6,162

X

- Definition

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount after adjustments of available-for-sale debt securities at cost, maturing in the sixth fiscal year through the tenth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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