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 June 30, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In Thousands)
Available-for-sale:
U.S. government agency obligations - government-sponsored enterprises	$	4,992	$	—	$	(17	)	$	4,975
Municipal obligations	7,137		2		(101		)	7,038
Collateralized mortgage obligations - government issued	21,961		83		(502		)	21,542
Collateralized mortgage obligations - government-sponsored enterprises	102,141		13		(2,619		)	99,535
Other securities	2,450		—		(70		)	2,380
	$	138,681	$	98	$	(3,309	)	$	135,470



	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

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 June 30, 2018
	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	$	—	$	(5	)	$	1,494
Municipal obligations	21,406		50		(117		)	21,339
Collateralized mortgage obligations - government issued	8,173		—		(277		)	7,896
Collateralized mortgage obligations - government-sponsored enterprises	9,868		—		(257		)	9,611
	$	40,946	$	50	$	(656	)	$	40,340



	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

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 the 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. Collateralized mortgage obligations - government issued represent securities guaranteed by the Government National Mortgage Association. Collateralized mortgage obligations - government-sponsored enterprises include securities guaranteed by FHLMC and FNMA. Other securities represent certificates of deposit of insured banks and savings institutions with an original maturity greater than three months. No sales of available-for-sale securities occurred during the six months ended June 30, 2018 and six sales of available-for-sale securities occurred during the six months ended June 30, 2017.

At June 30, 2018 and December 31, 2017, securities with a fair value of $2.5 million and $2.8 million, respectively, were pledged to secure interest rate swap contracts.

The amortized cost and fair value of securities by contractual maturity at June 30, 2018 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	$	6,795	$	6,786	$	2,273	$	2,267
Due in one year through five years	19,891		19,445		11,465		11,441
Due in five through ten years	29,450		28,819		20,209		19,821
Due in over ten years	82,545		80,420		6,999		6,811
	$	138,681	$	135,470	$	40,946	$	40,340

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 June 30, 2018 and December 31, 2017. At June 30, 2018, the Corporation held 166 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 June 30, 2018, the Corporation held 51 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 unaudited Consolidated Statements of Income for the six months ended June 30, 2018 and 2017.

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:



	As of June 30, 2018
	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	$	4,975	$	17	$	—	$	—	$	4,975	$	17
Municipal obligations	3,681		41		2,588		60		6,269		101
Collateralized mortgage obligations - government issued	10,917		232		6,353		270		17,270		502
Collateralized mortgage obligations - government-sponsored enterprises	68,892		1,552		25,464		1,067		94,356		2,619
Other securities	2,137		68		243		2		2,380		70
	$	90,602	$	1,910	$	34,648	$	1,399	$	125,250	$	3,309



	As of 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

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 June 30, 2018 and December 31, 2017. At June 30, 2018, the Corporation held 76 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 June 30, 2018. 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 unaudited Consolidated Statements of Income for the six months ended June 30, 2018 and 2017.

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:



	As of June 30, 2018
	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	$	5	$	1,499	$	5
Municipal obligations	13,308		109		258		8		13,566		117
Collateralized mortgage obligations - government issued	4,036		131		4,137		146		8,173		277
Collateralized mortgage obligations - government-sponsored enterprises	4,857		74		5,011		183		9,868		257
	$	22,201	$	314	$	10,905	$	342	$	33,106	$	656



	As of 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