Securities (Tables)

6 Months Ended

Jun. 30, 2013

Investment Securities [Abstract]

Schedule of securities sales activity with realized gains and losses derived using specific identification method

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Proceeds from sales	$	-	$	265,992	$	15,751	$	371,103
Gross gains on sales	$	-	$	6,490	$	116	$	7,047
Gross losses on sales		-		-		-		-
Net gains on sales of securities	$	-	$	6,490	$	116	$	7,047
Income tax expense attributable to sales	$	-	$	2,425	$	45	$	2,631

Schedule of amortized cost, gross unrealized gains and losses and fair value of securities held to maturity

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
As of June 30, 2013	Cost		Gains		Losses		Value
State and political subdivisions	$	51,757	$	4,332	$	4	$	56,085
Mortgage-backed securities (1)		163,190		7,658		238		170,610
Total	$	214,947	$	11,990	$	242	$	226,695
As of December 31, 2012
State and political subdivisions	$	51,780	$	5,486	$	-	$	57,266
Mortgage-backed securities (1)		192,404		11,461		-		203,865
Total	$	244,184	$	16,947	$	-	$	261,131
As of June 30, 2012
State and political subdivisions	$	51,801	$	5,586	$	-	$	57,387
Mortgage-backed securities (1)		230,949		11,635		-		242,584
Total	$	282,750	$	17,221	$	-	$	299,971
(1)     All are residential type mortgage-backed securities

Schedule of cost basis, unrealized gains and losses, and fair value of securities available for sale

			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
As of June 30, 2013	Cost		Gains		Losses		Value
State and political subdivisions	$	22,369	$	1,112	$	41	$	23,440
Mortgage-backed securities (1)		1,410,189		15,935		13,538		1,412,586
Corporate bonds		260,464		1,585		8,181		253,868
Asset-backed securities		242,690		2,645		491		244,844
Other		2,526		-		-		2,526
Total	$	1,938,238	$	21,277	$	22,251	$	1,937,264
As of December 31, 2012
State and political subdivisions	$	27,717	$	1,354	$	19	$	29,052
Mortgage-backed securities (1)		1,408,042		22,552		2,092		1,428,502
Corporate bonds		169,783		1,052		7,173		163,662
Asset-backed securities		209,411		1,894		749		210,556
Other		2,821		-		-		2,821
Total	$	1,817,774	$	26,852	$	10,033	$	1,834,593
As of June 30, 2012
U.S. Government agencies	$	43,618	$	256	$	-	$	43,874
State and political subdivisions		25,704		1,462		7		27,159
Mortgage-backed securities (1)		1,408,047		25,723		339		1,433,431
Corporate bonds		119,198		-		9,160		110,038
Asset-backed securities		85,090		-		592		84,498
Other		2,583		-		-		2,583
Total	$	1,684,240	$	27,441	$	10,098	$	1,701,583
(1)   All are residential type mortgage-backed securities

Schedule of held to maturity securities in an unrealized loss position

	Less than 12 Months				12 Months or More				Total
As of June 30, 2013	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
State and political subdivisions	$	374	$	4	$	-	$	-	$	374	$	4
Mortgage-backed securities	$	4,715	$	238	$	-	$	-		4,715		238
Total unrealized loss position	$	5,089	$	242	$	-	$	-	$	5,089	$	242

Schedule of available for sale securities in an unrealized loss position

	Less than 12 Months				12 Months or More				Total
As of June 30, 2013	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
State and political subdivisions	$	3,645	$	39	$	10	$	2	$	3,655	$	41
Mortgage-backed securities		636,449		13,538		-		-		636,449		13,538
Corporate bonds		97,501		4,635		77,404		3,546		174,905		8,181
Asset-backed securities		56,817		208		32,495		283		89,312		491
Total unrealized loss position	$	794,412	$	18,420	$	109,909	$	3,831	$	904,321	$	22,251
As of December 31, 2012
State and political subdivisions	$	3,674	$	17	$	10	$	2	$	3,684	$	19
Mortgage-backed securities		326,485		2,092		-		-		326,485		2,092
Corporate bonds		21,248		136		93,903		7,037		115,151		7,173
Asset-backed securities		82,188		749		-		-		82,188		749
Total unrealized loss position	$	433,595	$	2,994	$	93,913	$	7,039	$	527,508	$	10,033
As of June 30, 2012
State and political subdivisions	$	5,696	$	3	$	11	$	4	$	5,707	$	7
Mortgage-backed securities		104,644		332		19,436		7		124,080		339
Corporate bonds		16,500		3,500		93,488		5,660		109,988		9,160
Asset-backed securities		74,097		592		-		-		74,097		592
Total unrealized loss position	$	200,937	$	4,427	$	112,935	$	5,671	$	313,872	$	10,098

Schedule of amortized cost and fair value of held to maturity and available for sale securities by contractual maturity

	Available-for-Sale				Held-to-Maturity
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
State and political subdivisions:
Within 1 year	$	1,830	$	1,868	$	-	$	-
1 to 5 years		14,572		15,460		10,860		11,724
5 to 10 years		5,119		5,207		25,594		27,728
More than 10 years		848		905		15,303		16,633
		22,369		23,440		51,757		56,085
Corporate bonds:
1 to 5 years		38,183		38,451		-		-
5 to 10 years		211,517		205,234		-		-
More than 10 years		10,764		10,183		-		-
		260,464		253,868		-		-
Asset-backed securities:
1 to 5 years		40,537		40,644		-		-
5 to 10 years		153,281		155,038		-		-
More than 10 years		48,872		49,162		-		-
		242,690		244,844		-		-
Other:
More than 10 years		2,526		2,526		-		-
		2,526		2,526		-		-
Total securities other than mortgage-backed securities:
Within 1 year		1,830		1,868		-		-
1 to 5 years		93,292		94,555		10,860		11,724
5 to 10 years		369,917		365,479		25,594		27,728
More than 10 years		63,010		62,776		15,303		16,633
Mortgage-backed securities		1,410,189		1,412,586		163,190		170,610
	$	1,938,238	$	1,937,264	$	214,947	$	226,695