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Securities (Tables)

6 Months Ended

Jun. 30, 2018

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 June 30, 2018:

	Available-for-Sale Securities
June 30, 2018	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	498,540			$	0			$	10,941			$	487,599
Obligations of U.S. states and political subdivisions	87,510				74				1,374				86,210
Mortgage-backed securities – residential, issued by
U.S. Government agencies	124,343				261				4,728				119,876
U.S. Government sponsored entities	672,859				305				25,387				647,777
Non-U.S. Government agencies or sponsored entities	53				0				0				53
U.S. corporate debt securities	2,500				0				325				2,175
Total available-for-sale securities	$	1,385,805			$	640			$	42,755			$	1,343,690

The following table summarizes available-for-sale securities held by the Company at December 31, 2017:

	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

Schedule of held to maturity securities

The following table summarizes held-to-maturity securities held by the Company at June 30, 2018:

	Held-to-Maturity Securities
June 30, 2018	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
(in thousands)
Obligations of U.S. Government sponsored entities	$	131,507			$	0			$	2,230			$	129,277
Obligations of U.S. states and political subdivisions	7,906				42				4				7,944
Total held-to-maturity debt securities	$	139,413			$	42			$	2,234			$	137,221

The following table summarizes held-to-maturity securities held by the Company at December 31, 2017:

	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

Schedule of available for sale securities with unrealized losses

The following table summarizes available-for-sale securities that had unrealized losses at June 30, 2018:

	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	$	434,523			$	9,116			$	53,076			$	1,825			$	487,599			$	10,941
Obligations of U.S. states and political subdivisions	55,903				852				11,026				522				66,929				1,374
Mortgage-backed securities – residential, issued by
U.S. Government agencies	20,321				749				87,043				3,979				107,364				4,728
U.S. Government sponsored entities	226,916				6,178				406,749				19,209				633,665				25,387
U.S. corporate debt securities	0				0				2,175				325				2,175				325
Total available-for-sale securities	$	737,663			$	16,895			$	560,069			$	25,860			$	1,297,732			$	42,755

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

Schedule held-to-maturity securities with unrealized losses

The following table summarizes held-to-maturity securities that had unrealized losses at June 30, 2018.

	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	$	129,278			$	2,230			$	0			$	0			$	129,278			$	2,230
Obligations of U.S. states and political subdivisions	3,181				4				0				0				3,181				4
Total held-to-maturity securities	$	132,459			$	2,234			$	0			$	0			$	132,459			$	2,234

The following table summarizes held-to-maturity securities that had unrealized losses at December 31, 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	$	20,505			$	90			$	0			$	0			$	20,505			$	90
Obligations of U.S. states and political subdivisions	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.

June 30, 2018
(in thousands)	Amortized Cost				Fair Value
Available-for-sale securities:
Due in one year or less	$	72,650			$	72,406
Due after one year through five years	335,687				329,350
Due after five years through ten years	166,258				160,972
Due after ten years	13,955				13,256
Total	588,550				575,984
Mortgage-backed securities	797,255				767,706
Total available-for-sale debt securities	$	1,385,805			$	1,343,690

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

June 30, 2018
(in thousands)	Amortized Cost				Fair Value
Held-to-maturity securities:
Due in one year or less	$	7,264			$	7,268
Due after one year through five years	76,894				75,655
Due after five years through ten years	55,255				54,298
Total held-to-maturity debt securities	$	139,413			$	137,221

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

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