Securities

The amortized cost and fair value of securities available-for-sale and the corresponding amounts of gross unrealized gains and losses recognized in accumulated other comprehensive income were as follows:



	As of December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In Thousands)
Available-for-sale:
U.S. government agency obligations - government-sponsored enterprises	$	999	$	1	$	—		$	1,000
Municipal obligations	9,494		2		(82		)	9,414
Collateralized mortgage obligations - government issued	22,313		149		(213		)	22,249
Collateralized mortgage obligations - government-sponsored enterprises	91,480		24		(1,199		)	90,305
Other securities	3,040		3		(6		)	3,037
	$	127,326	$	179	$	(1,500	)	$	126,005



	As of December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In Thousands)
Available-for-sale:
U.S. government agency obligations - government-sponsored enterprises	$	6,298	$	7	$	(10	)	$	6,295
Municipal obligations	8,246		2		(92		)	8,156
Asset-backed securities	1,116		—		(35		)	1,081
Collateralized mortgage obligations - government issued	30,936		423		(146		)	31,213
Collateralized mortgage obligations - government-sponsored enterprises	99,865		252		(969		)	99,148
	$	146,461	$	684	$	(1,252	)	$	145,893

The amortized cost and fair value of securities held-to-maturity and the corresponding amounts of gross unrealized gains and losses were as follows:



	As of December 31, 2017
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In Thousands)
Held-to-maturity:
U.S. government agency obligations - government-sponsored enterprises	$	1,499	$	—	$	(9	)	$	1,490
Municipal obligations	21,680		176		(34		)	21,822
Collateralized mortgage obligations - government issued	9,072		1		(130		)	8,943
Collateralized mortgage obligations - government-sponsored enterprises	5,527		—		(86		)	5,441
	$	37,778	$	177	$	(259	)	$	37,696



	As of December 31, 2016
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In Thousands)
Held-to-maturity:
U.S. government agency obligations - government-sponsored enterprises	$	1,497	$	2	$	(5	)	$	1,494
Municipal obligations	21,173		62		(78		)	21,157
Collateralized mortgage obligations - government issued	9,148		17		(38		)	9,127
Collateralized mortgage obligations - government-sponsored enterprises	6,794		6		(58		)	6,742
	$	38,612	$	87	$	(179	)	$	38,520

U.S. government agency obligations - government-sponsored enterprises represent securities issued by the Federal Home Loan Bank (“FHLB”), the Federal Home Loan Mortgage Corporation (“FHLMC”) and Federal National Mortgage Association (“FNMA”). Municipal obligations include securities issued by various municipalities located primarily within the State of Wisconsin and are primarily general obligation bonds that are tax-exempt in nature. Asset-backed securities represent securities issued by the Student Loan Marketing Association (“SLMA”) which are 97% guaranteed by the U.S. government. Collateralized mortgage obligations - government issued represent securities guaranteed by the Government National Mortgage Association. Collateralized mortgage obligations - government-sponsored enterprises include securities guaranteed by the FHLMC and the FNMA. Other securities represent certificates of deposit of insured banks and savings institutions with an original maturity greater than three months.

Total proceeds and gross realized gains and losses from sales of securities available-for-sale were as follows:



	For the Year Ended December 31,
	2017			2016		2015
	(In Thousands)
Gross gains	$	92		$	10	$	—
Gross losses	(495		)	—		—
Net (losses) gains on sale of available-for-sale securities	$	(403	)	$	10	$	—
Proceeds from sale of available-for-sale securities	$	40,144		$	5,227	$	—

At December 31, 2017 and 2016, securities with a fair value of $2.8 million and $22.4 million, respectively, were pledged to secure interest rate swap contracts, outstanding FHLB advances and additional FHLB availability.

The amortized cost and fair value of securities by contractual maturity at December 31, 2017 are shown below. Actual maturities may differ from contractual maturities because issuers have the right to call or prepay certain obligations with or without call or prepayment penalties.



	Available-for-Sale				Held-to-Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
	(In Thousands)
Due in one year or less	$	5,090	$	5,080	$	1,499	$	1,490
Due in one year through five years	13,506		13,416		10,673		10,704
Due in five through ten years	35,941		35,642		15,713		15,734
Due in over ten years	72,789		71,867		9,893		9,768
	$	127,326	$	126,005	$	37,778	$	37,696

The tables below show the Corporation’s gross unrealized losses and fair value of available-for-sale investments, aggregated by investment category and length of time that individual investments were in a continuous loss position at December 31, 2017 and 2016. At December 31, 2017, the Corporation held 141 available-for-sale securities that were in an unrealized loss position. Such securities have not experienced credit rating downgrades; however, they have primarily declined in value due to the current interest rate environment. At December 31, 2017, the Corporation held 50 available-for-sale securities that had been in a continuous unrealized loss position for twelve months or greater.

The Corporation also has not specifically identified available-for-sale securities in a loss position that it intends to sell in the near term and does not believe that it will be required to sell any such securities. The Corporation reviews its securities on a quarterly basis to monitor its exposure to other-than-temporary impairment. Consideration is given to such factors as the length of time and extent to which the security has been in an unrealized loss position, changes in security ratings and an evaluation of the present value of expected future cash flows, if necessary. Based on the Corporation’s evaluation, it is expected that the Corporation will recover the entire amortized cost basis of each security. Accordingly, no other-than-temporary impairment was recorded in the Consolidated Statements of Income for the years ended December 31, 2017 and 2016.

A summary of unrealized loss information for securities available-for-sale, categorized by security type and length of time for which the security has been in a continuous unrealized loss position, follows:



	December 31, 2017
	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In Thousands)
Available-for-sale:
Municipal obligations	$	6,132	$	43	$	2,755	$	39	$	8,887	$	82
Collateralized mortgage obligations - government issued	7,104		40		6,715		173		13,819		213
Collateralized mortgage obligations - government-sponsored enterprises	59,256		476		28,004		723		87,260		1,199
Other securities	1,954		6		—		—		1,954		6
	$	74,446	$	565	$	37,474	$	935	$	111,920	$	1,500



	December 31, 2016
	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In Thousands)
Available-for-sale:
U.S. government agency obligations - government-sponsored enterprises	$	1,991	$	10	$	—	$	—	$	1,991	$	10
Municipal obligations	7,207		89		406		3		7,613		92
Asset-backed securities	—		—		1,081		35		1,081		35
Collateralized mortgage obligations - government issued	10,552		130		493		16		11,045		146
Collateralized mortgage obligations - government-sponsored enterprises	54,843		931		1,819		38		56,662		969
	$	74,593	$	1,160	$	3,799	$	92	$	78,392	$	1,252

The tables below show the Corporation’s gross unrealized losses and fair value of held-to-maturity investments, aggregated by investment category and length of time that individual investments were in a continuous loss position at December 31, 2017 and 2016. At December 31, 2017, the Corporation held 36 held-to-maturity securities that were in an unrealized loss position. Such securities have not experienced credit rating downgrades; however, they have primarily declined in value due to the current interest rate environment. There were 16 held-to-maturity securities that had been in a continuous loss position for twelve months or greater as of December 31, 2017. It is expected that the Corporation will recover the entire amortized cost basis of each held-to-maturity security based upon an evaluation of aforementioned factors. Accordingly, no other-than-temporary impairment was recorded in the Consolidated Statements of Income for the years ended December 31, 2017 and 2016.

A summary of unrealized loss information for securities held-to-maturity, categorized by security type and length of time for which the security has been in a continuous unrealized loss position, follows:



	December 31, 2017
	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In Thousands)
Held-to-maturity:
U.S. government agency obligations - government-sponsored enterprises	$	—	$	—	$	1,499	$	9	$	1,499	$	9
Municipal obligations	3,723		27		259		7		3,982		34
Collateralized mortgage obligations - government issued	3,868		51		4,677		79		8,545		130
Collateralized mortgage obligations - government-sponsored enterprises	—		—		5,527		86		5,527		86
	$	7,591	$	78	$	11,962	$	181	$	19,553	$	259



	December 31, 2016
	Less than 12 Months				12 Months or Longer				Total
	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
	(In Thousands)
Held-to-maturity:
U.S. government agency obligations - government-sponsored enterprises	$	1,000	$	5	$	—	$	—	$	1,000	$	5
Municipal obligations	9,472		78		—		—		9,472		78
Collateralized mortgage obligations - government issued	6,980		38		—		—		6,980		38
Collateralized mortgage obligations - government-sponsored enterprises	4,682		58		—		—		4,682		58
	$	22,134	$	179	$	—	$	—	$	22,134	$	179