Securities Available for Sale (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Securities [Abstract]

Amortized cost and fair values of investment in securities available for sale

The amortized cost and fair values of the Company’s investment in securities available for sale follow:

	March 31, 2013
			Gross	Gross
	Amortized		unrealized	unrealized
	cost		gains	losses		Fair value
	(In Thousands)
Mortgage-backed securities	$	111,803	2,381	(108	)	114,076
Collateralized mortgage obligations:
Government sponsored enterprise issued	25,682		410	—		26,092
Mortgage-related securities	137,485		2,791	(108	)	140,168
Government sponsored enterprise bonds	10,000		21	—		10,021
Municipal securities	57,550		1,746	(567	)	58,729
Other debt securities	5,000		136	—		5,136
Debt securities	72,550		1,903	(567	)	73,886
Certificates of Deposit	6,370		51	(4	)	6,417
	$	216,405	4,745	(679	)	220,471

	December 31, 2012
			Gross	Gross
	Amortized		unrealized	unrealized
	cost		gains	losses		Fair value
	(In Thousands)
Mortgage-backed securities	$	116,813	2,349	(106	)	119,056
Collateralized mortgage obligations:
Government sponsored enterprise issued	29,207		373	(1	)	29,579
Mortgage-related securities	146,020		2,722	(107	)	148,635
Government sponsored enterprise bonds	8,000		17	—		8,017
Municipal securities	35,493		2,043	(165	)	37,371
Other debt securities	5,000		70	—		5,070
Debt securities	48,493		2,130	(165	)	50,458
Certificates of Deposit	5,880		45	(1	)	5,924
	$	200,393	4,897	(273	)	205,017

The amortized cost and fair values of the Company’s investment in securities follow:

	December 31, 2012
			Gross	Gross
	Amortized		unrealized	unrealized
	cost		gains	losses		Fair value
	(In Thousands)
Mortgage-backed securities	$	116,813	2,349	(106	)	119,056
Collateralized mortgage obligations
Government sponsored enterprise issued	29,207		373	(1	)	29,579
Mortgage related securities	146,020		2,722	(107	)	148,635
Government sponsored enterprise bonds	8,000		17	—		8,017
Municipal securities	35,493		2,043	(165	)	37,371
Other debt securities	5,000		70	—		5,070
Debt securities	48,493		2,130	(165	)	50,458
Certificates of Deposit	5,880		45	(1	)	5,924
	$	200,393	4,897	(273	)	205,017

	December 31, 2011
			Gross	Gross
	Amortized		unrealized	unrealized
	cost		gains	losses		Fair value
	(In Thousands)
Mortgage-backed securities	$	33,561	1,857	(1	)	35,417
Collateralized mortgage obligations
Government sponsored enterprise issued	32,650		559	(13	)	33,196
Private label issued	19,475		16	(1,040	)	18,451
Mortgage related securities	85,686		2,432	(1,054	)	87,064
Government sponsored enterprise bonds	71,210		152	(13	)	71,349
Municipal securities	37,644		1,744	(320	)	39,068
Other debt securities	5,000		118	—		5,118
Debt securities	113,854		2,014	(333	)	115,535
Certificates of Deposit	3,920		2	(2	)	3,920
	$	203,460	4,448	(1,389	)	206,519

Amortized cost and fair values of investment securities by contractual maturity

The amortized cost and fair values of investment securities by contractual maturity at March 31, 2013 are shown below. Actual maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized		Fair
	Cost		Value
	(In Thousands)
Debt and other securities
Due within one year	$	2,750	2,756
Due after one year through five years	24,726		25,737
Due after five years through ten years	20,248		20,155
Due after ten years	31,196		31,655
Mortgage-related securities	137,485		140,168
	$	216,405	220,471

The amortized cost and fair value of securities at December 31, 2012, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because issuers or borrowers may have the right to prepay obligations with or without prepayment penalties.

	December 31, 2012
	Amortized
	cost		Fair value
	(In Thousands)
Debt securities:
Due within one year	$	2,925	2,932
Due after one year through five years	22,354		23,376
Due after five years through ten years	10,239		10,288
Due after ten years	18,855		19,786
Mortgage-related securities	146,020		148,635
	$	200,393	205,017

Total proceeds and gross gains and losses from sales of investment securities available for sale

Total proceeds and gross gains and losses from sales of investment securities available for sale for each of periods listed below.

	December 31,
	2012		2011	2010
	(In Thousands)
Gross gains	$	522	53	136
Gross losses	—		—	(81	)
Gains on sale of investment securities, net	$	522	53	55
Proceeds from sales of investment securities	$	30,089	3,230	20,733

Fair value and gross unrealized losses on securities available for sale and in a continuous unrealized loss position

Gross unrealized losses on securities available for sale and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position were as follows:

	March 31, 2013
	Less than 12 months				12 months or longer			Total
	Fair		Unrealized		Fair	Unrealized		Fair	Unrealized
	value		loss		value	loss		value	loss
	(In Thousands)
Mortgage-backed securities	$	8,012	(108	)	—	—		8,012	(108	)
Municipal securities	30,938		(477	)	384	(90	)	31,322	(567	)
Certificates of Deposit	1,221		(4	)	—	—		1,221	(4	)
	$	40,171	(589	)	384	(90	)	40,555	(679	)

	December 31, 2012
	Less than 12 months				12 months or longer			Total
	Fair		Unrealized		Fair	Unrealized		Fair	Unrealized
	value		loss		value	loss		value	loss
	(In Thousands)
Mortgage-backed securities	$	19,382	(106	)	—	—		19,382	(106	)
Collateralized mortgage obligations:
Government sponsored enterprise issued	1,419		(1	)	—	—		1,419	(1	)
Municipal securities	9,009		(94	)	398	(71	)	9,407	(165	)
Certificates of Deposit	244		(1	)	—	—		244	(1	)
	$	30,054	(202	)	398	(71	)	30,452	(273	)

Gross unrealized losses on securities available for sale and the fair value of the related securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position, were as follows:

	December 31, 2012
	Less than 12 months				12 months or longer			Total
	Fair		Unrealized		Fair	Unrealized		Fair	Unrealized
	value		loss		value	loss		value	loss
	(In Thousands)
Mortgage-backed securities	19,382		(106	)	—	—		19,382	(106	)
Collateralized mortgage obligations
Government sponsored enterprise issued	1,419		(1	)	—	—		1,419	(1	)
Municipal securities	9,009		(94	)	398	(71	)	9,407	(165	)
Certificates of Deposit	244		(1	)	—	—		244	(1	)
	$	30,054	(202	)	398	(71	)	30,452	(273	)

	December 31, 2011
	Less than 12 months				12 months or longer			Total
	Fair		Unrealized		Fair	Unrealized		Fair	Unrealized
	value		loss		value	loss		value	loss
	(In Thousands)
Mortgage-backed securities	1,167		(1	)	—	—		1,167	(1	)
Collateralized mortgage obligations
Government sponsored enterprise issued	5,726		(13	)	—	—		5,726	(13	)
Private-label issue	—		—		15,408	(1,040	)	15,408	(1,040	)
Government sponsored enterprise bonds	12,487		(13	)	—	—		12,487	(13	)
Municipal securities	228		(87	)	1,989	(233	)	2,217	(320	)
Certificates of Deposit	1,958		(2	)	—	—		1,958	(2	)
	$	21,566	(116	)	17,397	(1,273	)	38,963	(1,389	)

Change in other-than-temporary credit related impairment charges on collateralized mortgage obligations for which a portion of OTTI related to other factors was recognized in other comprehensive loss

The following table presents the change in other-than-temporary credit related impairment charges on securities available for sale for which a portion of the other-than-temporary impairments related to other factors was recognized in other comprehensive loss.

	(In Thousands)
Credit-related impairments on securities as of December 31, 2011	$	2,096
Credit-related impairments related to securites for which an other-than-temporary impairment was not previously recognized	100
Increase in credit-related impairments related to securities for which an other-than-temporary impairment was previously recognized	113
Reduction for sales of securities for which other-than-temporary was previously recognized	(2,209		)
Credit-related impairments on securities as of December 31, 2012	100
Credit-related impairments related to securites for which an other-than-temporary impairment was not previously recognized	—
Increase in credit-related impairments related to securities for which an other-than-temporary impairment was previously recognized	—
Credit-related impairments on securities as of March 31, 2013	$	100

In addition to the securities discussed above, during the year ended December 31, 2012, the Company identified two municipal securities that were deemed to be other-than-temporarily impaired.  Both securities were issued by a tax incremental district in a municipality located in Wisconsin.  During the year ended December 31, 2012, the Company received audited financial statements with respect to the municipal issuer that called into question the ability of the underlying taxing district that issued the securities to operate as a going concern.  During the year ended December 31, 2012, the Company’s analysis of these securities resulted in $100,000 in credit losses that were charged to earnings with respect to these two municipal securities.  As of December 31, 2012, these securities had a combined amortized cost of $215,000 and a combined estimated fair value of $237,000.  As of December 31, 2012, the Company had one municipal security which had been in an unrealized loss position for twelve months or longer.  This security was determined not to be other-than-temporarily impaired as of December 31, 2012.

The following table presents the change in other-than-temporary credit related impairment charges on collateralized mortgage obligations and municipal securities for which a portion of the other-than-temporary impairments related to other factors was recognized in other comprehensive loss.

	(in thousands)
Credit related impairments on securities as of December 31, 2010	$	1,640
Credit related impairments related to a security for which other-than-temporary impairment was not previously recognized	—
Increase in credit related impairments related to securities for which an other-than- temporary impairment was previously recognized	456
Credit related impairments on securities as of December 31, 2011	2,096
Credit related impairments related to a security for which other-than-temporary impairment was not previously recognized	100
Increase in credit related impairments related to securities for which an other-than- temporary impairment was previously recognized	113
Reduction for sales of securities for which other-than-temporary impairment was previously recognized	(2,209		)
Credit related impairments on securities as of December 31, 2012	$	100