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Securities (Tables)

9 Months Ended

Sep. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of available for sale securities

The following table summarizes available-for-sale securities held by the Company at September 30, 2017:

	Available-for-Sale Securities
September 30, 2017	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	532,958			$	2,466			$	1,222			$	534,202
Obligations of U.S. states and political subdivisions	91,771				558				286				92,043
Mortgage-backed securities – residential, issued by
U.S. Government agencies	145,470				903				1,700				144,673
U.S. Government sponsored entities	639,454				1,561				8,869				632,146
Non-U.S. Government agencies or sponsored entities	85				0				0				85
U.S. corporate debt securities	2,500				0				338				2,162
Total debt securities	1,412,238				5,488				12,415				1,405,311
Equity securities	1,000				0				80				920
Total available-for-sale securities	$	1,413,238			$	5,488			$	12,495			$	1,406,231

The following table summarizes available-for-sale securities held by the Company at December 31, 2016:

	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 table summarizes held-to-maturity securities held by the Company at September 30, 2017:

	Held-to-Maturity Securities
September 30, 2017	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	131,805			$	1,941			$	41			$	133,705
Obligations of U.S. states and political subdivisions	8,163				143				4				8,302
Total held-to-maturity debt securities	$	139,968			$	2,084			$	45			$	142,007

The following table summarizes held-to-maturity securities held by the Company at December 31, 2016:

	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 September 30, 2017:

	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	$	130,038			$	1,109			$	7,446			$	113			$	137,484			$	1,222
Obligations of U.S. states and political subdivisions	20,411				185				12,029				101				32,440				286
Mortgage-backed securities – residential, issued by
U.S. Government agencies	62,581				682				55,561				1,018				118,142				1,700
U.S. Government sponsored entities	300,477				2,794				242,432				6,075				542,909				8,869
U.S. corporate debt securities	0				0				2,163				338				2,163				338
Equity securities	0				0				920				80				920				80
Total available-for-sale securities	$	513,507			$	4,770			$	320,551			$	7,725			$	834,058			$	12,495

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

	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 September 30, 2017.

	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	$	4,959			$	41			$	0			$	0			$	4,959			$	41
Obligations of U.S. states and political subdivisions	1,121				4				0				0				1,121				4
Total held-to-maturity securities	$	6,080			$	45			$	0			$	0			$	6,080			$	45

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

	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. states and political subdivisions	2,567				3				0				0				2,567				3
Total held-to-maturity securities	$	43,369			$	286			$	0			$	0			$	43,369			$	286

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.

September 30, 2017
(in thousands)	Amortized Cost				Fair Value
Available-for-sale securities:
Due in one year or less	$	32,167			$	32,279
Due after one year through five years	403,739				405,216
Due after five years through ten years	172,316				172,276
Due after ten years	19,007				18,636
Total	627,229				628,407
Mortgage-backed securities	785,009				776,904
Total available-for-sale debt securities	$	1,412,238			$	1,405,311

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

September 30, 2017
(in thousands)	Amortized Cost				Fair Value
Held-to-maturity securities:
Due in one year or less	$	6,483			$	6,495
Due after one year through five years	42,080				42,764
Due after five years through ten years	91,405				92,748
Total held-to-maturity debt securities	$	139,968			$	142,007

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

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