Securities (Tables)

3 Months Ended

Mar. 31, 2017

Investments Debt And Equity Securities [Abstract]

Summary of the Amortized Cost and Fair Value of Available-for-Sale Investment Securities Corresponding Amounts of Unrealized Gains and Losses

The following table summarizes the amortized cost and fair value of the available-for-sale investment securities portfolio at March 31, 2017 and December 31, 2016 and the corresponding amounts of unrealized gains and losses recognized in accumulated other comprehensive income:

			Gross		Gross
(In Thousands of Dollars)	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
March 31, 2017
U.S. Treasury and U.S. government sponsored entities	$	5,467	$	4	$	(49	)	$	5,422
State and political subdivisions		166,479		1,108		(2,562	)		165,025
Corporate bonds		1,042		5		(6	)		1,041
Mortgage-backed securities - residential		170,675		567		(2,064	)		169,178
Collateralized mortgage obligations - residential		20,504		2		(695	)		19,811
Small Business Administration		16,720		0		(479	)		16,241
Equity securities		171		184		(1	)		354
Totals	$	381,058	$	1,870	$	(5,856	)	$	377,072

			Gross		Gross
(In Thousands of Dollars)	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses			Fair Value
December 31, 2016
U.S. Treasury and U.S. government sponsored entities	$	5,970	$	5	$	(54	)	$	5,921
State and political subdivisions		157,014		1,049		(2,760	)		155,303
Corporate bonds		1,343		4		(8	)		1,339
Mortgage-backed securities - residential		171,215		1,019		(2,552	)		169,682
Collateralized mortgage obligations - residential		21,397		1		(705	)		20,693
Small Business Administration		17,236		0		(530	)		16,706
Equity securities		168		185		(2	)		351
Totals	$	374,343	$	2,263	$	(6,611	)	$	369,995

Amortized Cost and Fair Value of the Debt Securities Maturity

The amortized cost and fair value of the debt securities portfolio are shown by expected maturity.  Expected maturities may differ from contractual maturities if issuers have the right to call or prepay obligations with or without call or prepayment penalties. Securities not due at a single maturity date are shown separately.

	March 31, 2017
(In Thousands of Dollars)	Amortized Cost		Fair Value
Maturity
Within one year	$	11,743	$	11,754
One to five years		52,051		52,432
Five to ten years		88,905		87,286
Beyond ten years		20,289		20,016
Mortgage-backed, collateralized mortgage obligations and Small    Business Administration securities		207,899		205,230
Total	$	380,887	$	376,718

Investment Securities with Unrealized Losses

The following table summarizes the investment securities with unrealized losses at March 31, 2017 and December 31, 2016, aggregated by major security type and length of time in a continuous unrealized loss position.

	Less than 12 Months					12 Months or Longer					Total
(In Thousands of Dollars)	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Loss			Value		Loss			Value		Loss
March 31, 2017
Available-for-sale
U.S. Treasury and U.S. government sponsored entities	$	4,719	$	(49	)	$	0	$	0		$	4,719	$	(49	)
State and political subdivisions		68,787		(2,549	)		286		(13	)		69,073		(2,562	)
Corporate bonds		486		(6	)		0		0			486		(6	)
Mortgage-backed securities - residential		80,341		(1,902	)		8,841		(162	)		89,182		(2,064	)
Collateralized mortgage obligations - residential		7,568		(118	)		10,573		(577	)		18,141		(695	)
Small Business Administration		8,420		(192	)		7,778		(287	)		16,198		(479	)
Equity securities		33		(1	)		0		0			33		(1	)
Total	$	170,354	$	(4,817	)	$	27,478	$	(1,039	)	$	197,832	$	(5,856	)

	Less than 12 Months					12 Months or Longer					Total
(In Thousands of Dollars)	Fair		Unrealized			Fair		Unrealized			Fair		Unrealized
	Value		Loss			Value		Loss			Value		Loss
December 31, 2016
Available-for-sale
U.S. Treasury and U.S. government sponsored entities	$	4,015	$	(54	)	$	502	$	0		$	4,517	$	(54	)
State and political subdivisions		92,560		(2,745	)		286		(15	)		92,846		(2,760	)
Corporate bonds		786		(8	)		0		0			786		(8	)
Mortgage-backed securities - residential		98,348		(1,823	)		29,743		(729	)		128,091		(2,552	)
Collateralized mortgage obligations - residential		7,956		(108	)		10,972		(597	)		18,928		(705	)
Small Business Administration		8,770		(205	)		7,890		(325	)		16,660		(530	)
Equity securities		44		(2	)		0		0			44		(2	)
Total	$	212,479	$	(4,945	)	$	49,393	$	(1,666	)	$	261,872	$	(6,611	)