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Investment securities (Tables)

3 Months Ended

Mar. 31, 2016

Amortized Cost and Fair Value of Investment Securities Aggregated by Investment Category

					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
March 31, 2016		Cost			Gains			Losses			Value
Available-for-sale:
U.S. Government-sponsored enterprises		$	64,562		$	499		$	7		$	65,054
State and municipals:
Taxable			14,801			993			11			15,783
Tax-exempt			120,232			3,815			33			124,014
Mortgage-backed securities:
U.S. Government agencies			29,156			97			45			29,208
U.S. Government-sponsored enterprises			30,078			145			107			30,116
Total		$	258,829		$	5,549		$	203		$	264,175
Held-to-maturity:
Tax-exempt state and municipals		$	6,864		$	333		$	1		$	7,196
Mortgage-backed securities:
U.S. Government agencies			81			1						82
U.S. Government-sponsored enterprises			4,736			308						5,044
Total		$	11,681		$	642		$	1		$	12,322

					Gross			Gross
		Amortized			Unrealized			Unrealized			Fair
December 31, 2015		Cost			Gains			Losses			Value
Available-for-sale:
U.S. Treasury securities		$	10,030					$	31		$	9,999
U.S. Government-sponsored enterprises			68,831		$	291			62			69,060
State and municipals:
Taxable			15,842			735			32			16,545
Tax-exempt			121,099			3,915			90			124,924
Mortgage-backed securities:
U.S. Government agencies			31,612			73			117			31,568
U.S. Government-sponsored enterprises			32,928			119			208			32,839
Total		$	280,342		$	5,133		$	540		$	284,935
Held-to-maturity:
Tax-exempt state and municipals		$	6,865		$	186		$	16		$	7,035
Mortgage-backed securities:
U.S. Government agencies			84			1						85
U.S. Government-sponsored enterprises			5,160			326						5,486
Total			12,109		$	513		$	16		$	12,606

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
March 31, 2016		Value			Losses			Value			Losses			Value			Losses
U.S. Government-sponsored enterprises		$	10,987		$	7								$	10,987		$	7
State and municipals:
Taxable								$	551		$	11			551			11
Tax-exempt			14,675			29			1,366			5			16,041			34
Mortgage-backed securities:
U.S. Government agencies			5,435			11			5,164			34			10,599			45
U.S. Government-sponsored enterprises			13,479			27			2,902			80			16,381			107
Total		$	44,576		$	74		$	9,983		$	130		$	54,559		$	204

		Less Than 12 Months						12 Months or More						Total
		Fair			Unrealized			Fair			Unrealized			Fair			Unrealized
December 31, 2015		Value			Losses			Value			Losses			Value			Losses
U.S. Treasury securities		$	9,999		$	31								$	9,999		$	31
U.S. Government-sponsored enterprises			34,159			62									34,159			62
State and municipals:
Taxable								$	532		$	32			532			32
Tax-exempt			21,341			87			1,952			19			23,293			106
Mortgage-backed securities:
U.S. Government agencies			15,114			56			5,477			61			20,591			117
U.S. Government-sponsored enterprises			17,647			104			6,030			104			23,677			208
Total		$	98,260		$	340		$	13,991		$	216		$	112,251		$	556

Available-for-Sale Securities

Maturity Distribution of Debt Securities

		Fair
March 31, 2016		Value
Within one year		$	26,168
After one but within five years			91,064
After five but within ten years			49,258
After ten years			38,361
			204,851
Mortgage-backed securities			59,324
Total		$	264,175

Held-to-maturity Securities

Maturity Distribution of Debt Securities

		Amortized			Fair
March 31, 2016		Cost			Value
Within one year
After one but within five years
After five but within ten years
After ten years		$	6,864		$	7,196
			6,864			7,196
Mortgage-backed securities			4,817			5,126
Total		$	11,681		$	12,322

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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=27724398&loc=d3e27290-111563

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