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Investment securities (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of amortized cost and fair value of investment securities aggregated by investment category

					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
September 30, 2017		Cost			Gains			Losses			Value
Available-for-sale:
U.S. Treasury securities		$	20,045		$	29		$	28		$	20,046
U.S. Government-sponsored enterprises			85,482			83			915			84,650
State and municipals:
Taxable			14,594			615			2			15,207
Tax-exempt			98,494			2,062			51			100,505
Residential Mortgage-backed securities:
U.S. Government agencies			16,045			21			33			16,033
U.S. Government-sponsored enterprises			16,492			29			95			16,426
Commercial Mortgage-backed securities:
U.S. Government-sponsored enterprises			6,326						85			6,241
Common equity securities			30									30
Total		$	257,508		$	2,839		$	1,209		$	259,138
Held-to-maturity:
Tax-exempt state and municipals		$	6,859		$	185		$	2		$	7,042
Residential Mortgage-backed securities:
U.S. Government agencies			58									58
U.S. Government-sponsored enterprises			2,647			165						2,812
Total		$	9,564		$	350		$	2		$	9,912

					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
December 31, 2016		Cost			Gains			Losses			Value
Available-for-sale:
U.S. Treasury securities		$	7,570					$	132		$	7,438
U.S. Government-sponsored enterprises			82,314		$	79			1,480			80,913
State and municipals:
Taxable			14,698			566			39			15,225
Tax-exempt			110,931			2,309			640			112,600
Residential Mortgage-backed securities:
U.S. Government agencies			21,041			48			47			21,042
U.S. Government-sponsored enterprises			22,303			48			159			22,192
Total		$	258,857		$	3,050		$	2,497		$	259,410
Held-to-maturity:
Tax-exempt state and municipals		$	6,862		$	72		$	67		$	6,867
Residential Mortgage-backed securities:
U.S. Government agencies			68			1						69
U.S. Government-sponsored enterprises			3,587			191						3,778
Total		$	10,517		$	264		$	67		$	10,714

Schedule of fair value and unrealized losses of investment securities in continuous unrealized loss position

		Less Than 12 Months						12 Months or More						Total
		Fair			Unrealized			Fair			Unrealized			Fair			Unrealized
September 30, 2017		Value			Losses			Value			Losses			Value			Losses
U.S. Treasury securities		$	5,494		$	28								$	5,494		$	28
U.S. Government-sponsored enterprises			48,573			376		$	29,309		$	539			77,882			915
State and municipals:
Taxable			551			2									551			2
Tax-exempt			5,330			50			2,482			3			7,812			53
Residential Mortgage-backed securities:
U.S. Government agencies			5,671			13			3,175			20			8,846			33
U.S. Government-sponsored enterprises			8,492			25			4,775			70			13,267			95
Commercial Mortgage-backed securities:
U.S. Government-sponsored enterprises			6,241			85									6,241			85
Total		$	80,352		$	579		$	39,741		$	632		$	120,093		$	1,211

		Less Than 12 Months						12 Months or More						Total
		Fair			Unrealized			Fair			Unrealized			Fair			Unrealized
December 31, 2016		Value			Losses			Value			Losses			Value			Losses
U.S. Treasury securities		$	7,438		$	132								$	7,438		$	132
U.S. Government-sponsored enterprises			59,460			1,480									59,460			1,480
State and municipals:
Taxable			1,035			39									1,035			39
Tax-exempt			55,166			707		$	226						55,392			707
Residential Mortgage-backed securities:
U.S. Government agencies			5,917			27			1,496		$	20			7,413			47
U.S. Government-sponsored enterprises			16,412			85			2,712			74			19,124			159
Total		$	145,428		$	2,470		$	4,434		$	94		$	149,862		$	2,564

Available-for-Sale Securities

Schedule of maturity distribution of fair value

		Fair
September 30, 2017		Value
Within one year		$	15,858
After one but within five years			148,810
After five but within ten years			40,582
After ten years			15,158
			220,408
Mortgage-backed securities			38,700
Total		$	259,108

Held-to-maturity Securities

Schedule of maturity distribution of fair value

		Amortized			Fair
September 30, 2017		Cost			Value
Within one year
After one but within five years
After five but within ten years
After ten years		$	6,859		$	7,042
			6,859			7,042
Mortgage-backed securities			2,705			2,870
Total		$	9,564		$	9,912

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- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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- Definition

For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

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