Securities (Tables)

12 Months Ended

Dec. 31, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of available for sale securities

The following table sets forth information with regard to sales transactions of securities available-for-sale:

	Year ended December 31,
(in thousands)	2017			2016		2015
Proceeds from sales	$	64,106		$	97,296	$	137,594
Gross realized gains	19			894		1,359
Gross realized losses	(426		)	0		(282		)
Net (loss) gain on sales of available-for-sale securities	$	(407	)	$	894	$	1,077

The following tables summarize available-for-sale securities held by the Company at December 31, 2017 and 2016:

	Available-for-Sale Securities
December 31, 2017	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	507,248	$	278	$	3,333	$	504,193
Obligations of U.S. states and political subdivisions	91,659		281		421		91,519
Mortgage-backed securities – residential, issued by
U.S. Government agencies	139,747		659		2,671		137,735
U.S. Government sponsored entities	667,767		1,045		12,634		656,178
Non-U.S. Government agencies or sponsored entities	75		0		0		75
U.S. corporate debt securities	2,500		0		338		2,162
Total debt securities	1,408,996		2,263		19,397		1,391,862
Equity securities	1,000		0		87		913
Total available-for-sale securities	$	1,409,996	$	2,263	$	19,484	$	1,392,775

	Available-for-Sale Securities
December 31, 2016	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	527,057	$	2,873	$	2,303	$	527,627
Obligations of U.S. states and political subdivisions	89,910		286		1,140		89,056
Mortgage-backed securities – residential, issued by
U.S. Government agencies	159,417		1,081		2,272		158,226
U.S. Government sponsored entities	662,724		1,993		13,287		651,430
Non-U.S. Government agencies or sponsored entities	116		0		0		116
U.S. corporate debt securities	2,500		0		338		2,162
Total debt securities	1,441,724		6,233		19,340		1,428,617
Equity securities	1,000		0		79		921
Total available-for-sale securities	$	1,442,724	$	6,233	$	19,419	$	1,429,538

Schedule of held to maturity securities

The following tables summarize held-to-maturity securities held by the Company at December 31, 2017 and 2016:

	Held-to-Maturity Securities
December 31, 2017	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	131,707	$	1,103	$	90	$	132,720
Obligations of U.S. states and political subdivisions	7,509		93		7		7,595
Total held-to-maturity debt securities	$	139,216	$	1,196	$	97	$	140,315

Held-to-Maturity Securities

	Held-to-Maturity Securities
December 31, 2016	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	132,098	$	804	$	283	$	132,619
Obligations of U.S. states and political subdivisions	10,021		195		3		10,213
Total held-to-maturity debt securities	$	142,119	$	999	$	286	$	142,832

Schedule of available for sale securities with unrealized losses

The following table summarizes available-for-sale securities that had unrealized losses at December 31, 2017:

December 31, 2017
Available-for-Sale Securities	Less than 12 Months				12 Months or Longer				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. Government sponsored entities	$	319,545	$	2,301	$	39,791	$	1,032	$	359,336	$	3,333
Obligations of U.S. states and political subdivisions	39,571		219		11,729		202		51,300		421
Mortgage-backed securities – residential, issued by
U.S. Government agencies	33,056		452		86,562		2,219		119,618		2,671
U.S. Government sponsored entities	208,524		1,941		410,767		10,693		619,291		12,634
U.S. corporate debt securities	0		0		2,163		338		2,163		338
Equity securities	0		0		913		87		913		87
Total available-for-sale securities	$	600,696	$	4,913	$	551,925	$	14,571	$	1,152,621	$	19,484

The following table summarizes available-for-sale securities that had unrealized losses at December 31, 2016: 

December 31, 2016
Available-for-Sale Securities	Less than 12 Months				12 Months or Longer				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. Government sponsored entities	$	208,940	$	2,303	$	0	$	0	$	208,940	$	2,303
Obligations of U.S. states and political subdivisions	58,852		1,139		751		1		59,603		1,140
Mortgage-backed securities – residential, issued by
U.S. Government agencies	98,307		1,570		22,376		702		120,683		2,272
U.S. Government sponsored entities	463,009		8,933		123,915		4,354		586,924		13,287
U.S. corporate debt securities	0		0		2,162		338		2,162		338
Equity securities	0		0		921		79		921		79
Total available-for-sale securities	$	829,108	$	13,945	$	150,125	$	5,474	$	979,233	$	19,419

Schedule held-to-maturity securities with unrealized losses

The following table summarizes held-to-maturity securities that had unrealized losses at December 31, 2016:

Held-to-Maturity Securities	Less than 12 Months				12 Months or Longer				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. Government sponsored entities	$	40,802	$	283	$	0	$	0	$	40,802	$	283
Obligations of U.S. sponsored entities	2,567		3		0		0		2,567		3
Total held-to-maturity securities	$	43,369	$	286	$	0	$	0	$	43,369	$	286

The following table summarizes held-to-maturity securities that had unrealized losses at December 31, 2017:

Held-to-Maturity Securities	Less than 12 Months				12 Months or Longer				Total
(in thousands)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses		Fair Value		Unrealized Losses
Obligations of U.S. Government sponsored entities	$	20,505	$	90	$	0	$	0	$	20,505	$	90
Obligations of U.S. sponsored entities	5,094		7		0		0		5,094		7
Total held-to-maturity securities	$	25,599	$	97	$	0	$	0	$	25,599	$	97

Schedule of amortized cost and estimated fair value of debt securities by contractual maturity

The amortized cost and estimated fair value of debt securities by contractual maturity are shown in the following table. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties. Mortgage-backed securities are shown separately since they are not due at a single maturity date. 

December 31, 2017
(in thousands)	Amortized Cost		Fair Value
Available-for-sale securities:
Due in one year or less	$	51,909	$	51,932
Due after one year through five years	368,846		367,377
Due after five years through ten years	162,061		160,374
Due after ten years	18,591		18,191
Total	601,407		597,874
Mortgage-backed securities	807,589		793,988
Total available-for-sale debt securities	$	1,408,996	$	1,391,862

December 31, 2016
(in thousands)	Amortized Cost		Fair Value
Available-for-sale securities:
Due in one year or less	$	17,878	$	18,034
Due after one year through five years	376,777		378,631
Due after five years through ten years	210,985		208,999
Due after ten years	13,827		13,181
Total	619,467		618,845
Mortgage-backed securities	822,257		809,772
Total available-for-sale debt securities	$	1,441,724	$	1,428,617

December 31, 2017
(in thousands)	Amortized Cost		Fair Value
Held-to-maturity securities:
Due in one year or less	$	5,980	$	5,979
Due after one year through five years	51,936		52,227
Due after five years through ten years	81,300		82,109
Due after ten years	0		0
Total held-to-maturity debt securities	$	139,216	$	140,315

December 31, 2016
(in thousands)	Amortized Cost		Fair Value
Held-to-maturity securities:
Due in one year or less	$	7,452	$	7,469
Due after one year through five years	27,480		27,866
Due after five years through ten years	107,187		107,497
Due after ten years	0		0
Total held-to-maturity debt securities	$	142,119	$	142,832