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Securities Available-for-Sale (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Securities available-for-sale
Securities, Amortized Cost	$ 421,661	$ 419,947
Securities, Gross Unrealized Gains	5,718	1,297
Securities, Gross Unrealized Losses	(1,530)	(9,210)
Securities, Fair Value	425,849	412,034
Federal agency obligations [Member]
Securities available-for-sale
Securities, Amortized Cost	23,712	45,509
Securities, Gross Unrealized Gains	824	51
Securities, Gross Unrealized Losses	(1)	(605)
Securities, Fair Value	24,535	44,955
Residential mortgage pass-through securities [Member]
Securities available-for-sale
Securities, Amortized Cost	215,378	189,721
Securities, Gross Unrealized Gains	1,286	85
Securities, Gross Unrealized Losses	(859)	(4,602)
Securities, Fair Value	215,805	185,204
Commercial mortgage pass-through securities [Member]
Securities available-for-sale
Securities, Amortized Cost	5,017	3,919
Securities, Gross Unrealized Gains	73
Securities, Gross Unrealized Losses		(45)
Securities, Fair Value	5,090	3,874
Obligations of U.S. states and political subdivisions [Member]
Securities available-for-sale
Securities, Amortized Cost	140,870	141,496
Securities, Gross Unrealized Gains	3,222	1,091
Securities, Gross Unrealized Losses	(436)	(3,402)
Securities, Fair Value	143,656	139,185
Corporate bonds and notes [Member]
Securities available-for-sale
Securities, Amortized Cost	28,135	26,308
Securities, Gross Unrealized Gains	308	45
Securities, Gross Unrealized Losses	(193)	(540)
Securities, Fair Value	28,250	25,813
Asset-backed securities [Member]
Securities available-for-sale
Securities, Amortized Cost	6,132	9,685
Securities, Gross Unrealized Gains	3	22
Securities, Gross Unrealized Losses	(41)	(16)
Securities, Fair Value	6,094	9,691
Certificates of deposit [Member]
Securities available-for-sale
Securities, Amortized Cost	148	319
Securities, Gross Unrealized Gains	2	3
Securities, Gross Unrealized Losses
Securities, Fair Value	150	322
Other securities [Member]
Securities available-for-sale
Securities, Amortized Cost	2,269	2,990
Securities, Gross Unrealized Gains
Securities, Gross Unrealized Losses
Securities, Fair Value	$ 2,269	$ 2,990

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- Definition

Available for sale securities gross unrealized gain accumulated in investments.

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Available for sale securities gross unrealized loss accumulated in investments.

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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This item represents the cost of debt and equity 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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