Investment Securities (Tables)

12 Months Ended

Dec. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Available-for-sale Securities

The following is a summary of the amortized cost and fair value of investment securities available-for-sale and investment securities held-to-maturity at December 31, 2012 and 2011:

	Investment Securities Available-for-Sale
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
	(In thousands)
December 31, 2012
Government sponsored agencies	$	97,529	$	241	$	213	$	97,557
State and political subdivisions	47,663		2,302		—		49,965
Residential mortgage-backed securities	96,320		3,100		9		99,411
Collateralized mortgage obligations	262,790		984		182		263,592
Corporate bonds	69,788		546		539		69,795
Preferred stock	6,144		345		—		6,489
Total	$	580,234	$	7,518	$	943	$	586,809
December 31, 2011
Government sponsored agencies	$	70,486	$	240	$	47	$	70,679
State and political subdivisions	42,881		2,354		—		45,235
Residential mortgage-backed securities	117,198		3,883		301		120,780
Collateralized mortgage obligations	332,632		600		832		332,400
Corporate bonds	97,558		45		835		96,768
Preferred stock	1,389		46		21		1,414
Total	$	662,144	$	7,168	$	2,036	$	667,276

Held-to-maturity Securities

	Investment Securities Held-to-Maturity
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
	(In thousands)
December 31, 2012
State and political subdivisions	$	219,477	$	8,087	$	3,367	$	224,197
Trust preferred securities	10,500		—		4,775		5,725
Total	$	229,977	$	8,087	$	8,142	$	229,922
December 31, 2011
State and political subdivisions	$	172,839	$	6,807	$	342	$	179,304
Trust preferred securities	10,500		—		6,035		4,465
Total	$	183,339	$	6,807	$	6,377	$	183,769

Amortized cost and fair value of debt securities by contractual maturity

	December 31, 2012
	Amortized Cost		Fair Value
	(In thousands)
Investment Securities Available-for-Sale:
Due in one year or less	$	268,608	$	270,737
Due after one year through five years	250,615		252,835
Due after five years through ten years	47,488		49,260
Due after ten years	7,379		7,488
Preferred stock	6,144		6,489
Total	$	580,234	$	586,809
Investment Securities Held-to-Maturity:
Due in one year or less	$	38,311	$	38,371
Due after one year through five years	92,915		94,790
Due after five years through ten years	64,915		67,129
Due after ten years	33,836		29,632
Total	$	229,977	$	229,922

Summary of continuous unrealized loss position of securities

	Less Than 12 Months				12 Months or More				Total
	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
December 31, 2012	(In thousands)
Government sponsored agencies	$	46,103	$	213	$	—	$	—	$	46,103	$	213
State and political subdivisions	70,675		2,257		8,046		1,110		78,721		3,367
Residential mortgage-backed securities	273		1		1,305		8		1,578		9
Collateralized mortgage obligations	19,331		10		36,835		172		56,166		182
Corporate bonds	4,747		253		34,707		286		39,454		539
Trust preferred securities	—		—		5,725		4,775		5,725		4,775
Total	$	141,129	$	2,734	$	86,618	$	6,351	$	227,747	$	9,085
December 31, 2011
Government sponsored agencies	$	9,883	$	36	$	9,632	$	11	$	19,515	$	47
State and political subdivisions	—		—		31,706		342		31,706		342
Residential mortgage-backed securities	27,367		152		19,018		149		46,385		301
Collateralized mortgage obligations	200,218		703		18,176		129		218,394		832
Corporate bonds	50,590		415		14,580		420		65,170		835
Trust preferred securities	—		—		4,465		6,035		4,465		6,035
Preferred stock	—		—		319		21		319		21
Total	$	288,058	$	1,306	$	97,896	$	7,107	$	385,954	$	8,413