Securities (Tables)

9 Months Ended

Sep. 30, 2018

Investments Debt And Equity Securities [Abstract]

Aggregate Amortized Costs and Fair Values of Available-for-Sale Securities

The aggregate amortized costs and fair values of available-for-sale securities as of the dates stated were as follows.

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
September 30, 2018	Cost		Gains		(Losses)			Value
U.S. Government agencies and mortgage backed securities	$	52,073	$	1	$	(1,938	)	$	50,136
State and municipal obligations		20,525		12		(599	)		19,938
Corporate bonds		11,177		5		(41	)		11,141
Total available-for-sale securities	$	83,775	$	18	$	(2,578	)	$	81,215

			Gross		Gross
	Amortized		Unrealized		Unrealized			Fair
December 31, 2017	Cost		Gains		(Losses)			Value
U.S. Government agencies and mortgage backed securities	$	49,964	$	6	$	(687	)	$	49,283
State and municipal obligations		21,113		195		(155	)		21,153
Corporate bonds		6,696		23		(2	)		6,717
Total available-for-sale securities	$	77,773	$	224	$	(844	)	$	77,153

Unrealized Loss Positions

The following tables provide additional information on these securities as of the dates stated.

	Less than 12 months					12 months or more					Total
September 30, 2018	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. Government agencies and mortgage backed    securities	$	17,047	$	(498	)	$	32,892	$	(1,440	)	$	49,939	$	(1,938	)
State and municipal obligations		11,996		(191	)		5,767		(408	)		17,763		(599	)
Corporate bonds		2,484		(41	)		—		—			2,484		(41	)
Total temporarily impaired securities	$	31,527	$	(730	)	$	38,659	$	(1,848	)	$	70,186	$	(2,578	)

	Less than 12 months					12 months or more					Total
December 31, 2017	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. Government agencies and mortgage backed    securities	$	25,053	$	(353	)	$	16,184	$	(334	)	$	41,237	$	(687	)
State and municipal obligations		2,753		(15	)		5,787		(140	)		8,540		(155	)
Corporate bonds		498		(2	)		—		—			498		(2	)
Total temporarily impaired securities	$	28,304	$	(370	)	$	21,971	$	(474	)	$	50,275	$	(844	)

Summary of Amortized Cost and Fair Value by Contractual Maturity of Securities Available for Sale

The following table presents the amortized cost and fair value by contractual maturity of securities available for sale as of the dates stated. Expected maturities may differ from contractual maturities, as issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

	September 30, 2018				December 31, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in one year or less	$	978	$	973	$	3,583	$	3,514
Due after one year but less than five years		45,633		44,382		37,747		37,425
Due after five years but less than ten years		28,063		27,236		28,441		28,250
Due after ten years		9,101		8,624		8,002		7,964
Total available-for-sale securities	$	83,775	$	81,215	$	77,773	$	77,153