Securities Available for Sale and Held to Maturity (Tables)

3 Months Ended

Mar. 31, 2015

Securities Available for Sale and Held to Maturity [Abstract]

Amortized cost and estimated fair value of available for sale and held to maturity securities

The following table is a summary of the amortized cost and estimated fair value of securities available for sale and held to maturity ($ in thousands):

	Securities Available for Sale									Securities Held to Maturity
March 31, 2015	Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized (Losses)			Estimated Fair Value
U.S. Government agency obligations
Issued by U.S. Government agencies	$	77,812	$	860	$	(557	)	$	78,115	$	-	$	-	$	-		$	-
Issued by U.S. Government sponsored agencies		32,737		339		-			33,076		101,171		4,358		-			105,529
Obligations of states and political subdivisions		154,591		5,595		(32	)		160,154		62,928		3,739		-			66,667
Mortgage-backed securities
Residential mortgage pass-through securities
Guaranteed by GNMA		11,403		613		(6	)		12,010		18,861		548		(6	)		19,403
Issued by FNMA and FHLMC		189,935		5,536		(1	)		195,470		11,341		578		-			11,919
Other residential mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		1,625,597		26,162		(5,049	)		1,646,710		842,827		15,784		(151	)		858,460
Commercial mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		219,149		6,677		-			225,826		147,426		3,190		(89	)		150,527
Asset-backed securities and structured financial products		29,243		855		-			30,098		-		-		-			-
Total	$	2,340,467	$	46,637	$	(5,645	)	$	2,381,459	$	1,184,554	$	28,197	$	(246	)	$	1,212,505
December 31, 2014
U.S. Treasury securities	$	100	$	-	$	-		$	100	$	-	$	-	$	-		$	-
U.S. Government agency obligations
Issued by U.S. Government agencies		79,788		694		(826	)		79,656		-		-		-			-
Issued by U.S. Government sponsored agencies		32,725		170		(77	)		32,818		100,971		2,631		-			103,602
Obligations of states and political subdivisions		157,001		5,325		(68	)		162,258		63,505		3,398		-			66,903
Mortgage-backed securities
Residential mortgage pass-through securities
Guaranteed by GNMA		11,897		544		(14	)		12,427		19,115		466		(16	)		19,565
Issued by FNMA and FHLMC		199,599		4,842		-			204,441		11,437		471		-			11,908
Other residential mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		1,655,733		16,664		(10,564	)		1,661,833		834,176		6,440		(1,916	)		838,700
Commercial mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		184,394		4,968		(28	)		189,334		141,481		1,750		(1,063	)		142,168
Asset-backed securities and structured financial products		30,776		924		-			31,700		-		-		-			-
Total	$	2,352,013	$	34,131	$	(11,577	)	$	2,374,567	$	1,170,685	$	15,156	$	(2,995	)	$	1,182,846

Securities with gross unrealized losses, segregated by length of impairment

The table below includes securities with gross unrealized losses segregated by length of impairment at March 31, 2015 and December 31, 2014 ($ in thousands):

	Less than 12 Months					12 Months or More					Total
March 31, 2015	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses
U.S. Government agency obligations
Issued by U.S. Government agencies	$	-	$	-		$	34,542	$	(557	)	$	34,542	$	(557	)
Obligations of states and political subdivisions		2,359		(9	)		2,861		(23	)		5,220		(32	)
Mortgage-backed securities
Residential mortgage pass-through securities
Guaranteed by GNMA		5,407		(12	)		-		-			5,407		(12	)
Issued by FNMA and FHLMC		27		(1	)		-		-			27		(1	)
Other residential mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		114,658		(634	)		272,760		(4,566	)		387,418		(5,200	)
Commercial mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		6,703		(30	)		26,353		(59	)		33,056		(89	)
Total	$	129,154	$	(686	)	$	336,516	$	(5,205	)	$	465,670	$	(5,891	)
December 31, 2014
U.S. Government agency obligations
Issued by U.S. Government agencies	$	19,220	$	(115	)	$	32,656	$	(711	)	$	51,876	$	(826	)
Issued by U.S. Government sponsored agencies		9,948		(52	)		9,956		(25	)		19,904		(77	)
Obligations of states and political subdivisions		8,431		(22	)		3,800		(46	)		12,231		(68	)
Mortgage-backed securities
Residential mortgage pass-through securities
Guaranteed by GNMA		7,199		(22	)		647		(8	)		7,846		(30	)
Other residential mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		537,033		(2,449	)		395,342		(10,031	)		932,375		(12,480	)
Commercial mortgage-backed securities
Issued or guaranteed by FNMA, FHLMC or GNMA		9,134		(3	)		79,829		(1,088	)		88,963		(1,091	)
Total	$	590,965	$	(2,663	)	$	522,230	$	(11,909	)	$	1,113,195	$	(14,572	)

Gains and losses as a result of calls and disposition of securities

Gains and losses as a result of calls and dispositions of securities, as well as any associated proceeds, were as follows ($ in thousands):

	Three Months Ended March 31,
Available for Sale	2015		2014
Proceeds from calls and sales of securities	$	-	$	26,274
Gross realized gains		-		389

Contractual maturities of available for sale and held to maturity securities

The amortized cost and estimated fair value of securities available for sale and held to maturity at March 31, 2015, by contractual maturity, are shown below ($ in thousands).  Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

	Securities Available for Sale				Securities Held to Maturity
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	18,840	$	18,955	$	2,441	$	2,460
Due after one year through five years		136,818		141,195		11,818		12,345
Due after five years through ten years		58,712		61,041		137,514		144,041
Due after ten years		80,013		80,252		12,326		13,350
		294,383		301,443		164,099		172,196
Mortgage-backed securities		2,046,084		2,080,016		1,020,455		1,040,309
Total	$	2,340,467	$	2,381,459	$	1,184,554	$	1,212,505