Investment Securities (Tables)

6 Months Ended

Jun. 30, 2014

Investments Debt And Equity Securities [Abstract]

Schedule of Amortized Cost and Estimated Fair Value of Available-for-Sale Investment Securities

The following tables detail the amortized cost and the estimated fair value of our available-for-sale investment securities. None of our investment securities is classified as trading or held-to-maturity.

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In Thousands)
Available-for-sale securities:
June 30, 2014:
State and political subdivisions	$	111,256	$	2,484	$	(1,159	)	$	112,581
U.S. Government and government sponsored enterprises (“GSE”)		36,986		55		(20	)		37,021
Collateralized Mortgage Obligation (“CMO”)		163,781		482		(2,185	)		162,078
Federal National Mortgage Association (“FNMA”) Mortgage-Backed Securities (“MBS”)		321,960		735		(3,371	)		319,324
Federal Home Loan Mortgage Corporation MBS (“FHLMC”)		127,454		244		(1,406	)		126,292
Government National Mortgage Association MBS (“GNMA”)		84,436		499		(525	)		84,410
	$	845,873	$	4,499	$	(8,666	)	$	841,706
December 31, 2013
State and political subdivisions	$	105,354	$	257	$	(5,426	)	$	100,185
GSE		32,082		93		(17	)		32,158
CMO		103,064		28		(5,535	)		97,557
FNMA MBS		382,909		20		(15,801	)		367,128
FHLMC MBS		129,460		29		(4,994	)		124,495
GNMA MBS		97,830		743		(2,981	)		95,592
	$	850,699	$	1,170	$	(34,754	)	$	817,115

Schedule of Maturities of Investment Securities Available-for-Sale

The scheduled maturities of investment securities available-for-sale at June 30, 2014 and December 31, 2013 were as follows:

	Available-for-Sale
	Amortized Cost		Fair Value
	(In Thousands)
June 30, 2014
Within one year	$	23,178	$	23,224
After one year but within five years		38,821		39,376
After five years but within ten years		235,509		233,595
After ten years		548,365		545,511
	$	845,873	$	841,706
December 31, 2013
Within one year	$	16,319	$	16,378
After one year but within five years		19,761		19,986
After five years but within ten years		229,033		217,911
After ten years		585,586		562,840
	$	850,699	$	817,115

Schedule of Investment Securities' Gross Unrealized Losses and Fair Value by Investment Category

The tables below show our investment securities’ gross unrealized losses and fair value by investment category and length of time that individual securities were in a continuous unrealized loss position at June 30, 2014 and December 31, 2013.

	Less than 12 months				12 months or longer				Total
June 30, 2014	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(In Thousands)
Available-for-sale
State and political subdivisions	$	5,727	$	19	$	44,075	$	1,140	$	49,802	$	1,159
GSE		10,951		20		—		—		10,951		20
CMO		16,488		23		73,140		2,162		89,628		2,185
FNMA MBS		27,205		234		195,763		3,137		222,968		3,371
FHLMC MBS		3,798		6		96,077		1,400		99,875		1,406
GNMA MBS		—		—		52,020		525		52,020		525
Total temporarily impaired investments	$	64,169	$	302	$	461,075	$	8,364	$	525,244	$	8,666
	Less than 12 months				12 months or longer				Total
December 31, 2013	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
	(In Thousands)
Available-for-sale
State and political subdivisions	$	83,036	$	5,426	$	—	$	—	$	83,036	$	5,426
GSE		3,972		13		2,001		4		5,973		17
CMO		73,109		4,173		21,590		1,362		94,699		5,535
FNMA MBS		346,266		14,386		17,800		1,415		364,066		15,801
FHLMC MBS		116,732		4,548		7,307		446		124,039		4,994
GNMA MBS		57,076		1,897		18,829		1,084		75,905		2,981
Total temporarily impaired investments	$	680,191	$	30,443	$	67,527	$	4,311	$	747,718	$	34,754