Schedule of amortized cost and fair value of investment securities available for sale


			Gross		Gross
	Amortized		Unrealized		Unrealized		Fair
(Dollars in thousands)	Cost		Gains		Losses		Value
December 31, 2019:
Government-sponsored entities debt*	$	25,356	$	585	$	—	$	25,941
State and municipal obligations		204,150		5,029		(764)		208,415
Mortgage-backed securities**		1,711,257		14,209		(3,775)		1,721,691
	$	1,940,763	$	19,823	$	(4,539)	$	1,956,047
December 31, 2018:
Government-sponsored entities debt*	$	48,982	$	21	$	(752)	$	48,251
State and municipal obligations		200,184		1,709		(1,125)		200,768
Mortgage-backed securities**		1,291,484		697		(24,133)		1,268,048
	$	1,540,650	$	2,427	$	(26,010)	$	1,517,067

* The Company’s government-sponsored entities holdings are comprised of debt securities offered by Federal Home Loan Mortgage Corporation (“FHLMC”) or Freddie Mac, Federal National Mortgage Association (“FNMA”) or Fannie Mae, FHLB, and Federal Farm Credit Banks (“FFCB”). Also included in the Company’s government-sponsored entities are debt securities offered by the Small Business Administration (“SBA”), which have the full faith and credit backing of the United States Government.

** All of the mortgage-backed securities are issued by government-sponsored entities; there are no private-label holdings.

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


	Securities
	Available for Sale
	Amortized		Fair
(Dollars in thousands)	Cost		Value
Due in one year or less	$	7,267	$	7,315
Due after one year through five years		54,662		55,286
Due after five years through ten years		442,830		447,167
Due after ten years		1,436,004		1,446,279
	$	1,940,763	$	1,956,047

Schedule of securities with gross unrealized losses, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position


	Less Than				Twelve Months
	Twelve Months				or More
	Gross				Gross
	Unrealized		Fair		Unrealized		Fair
(Dollars in thousands)	Losses		Value		Losses		Value
December 31, 2019:
Securities Available for Sale
Government-sponsored entities debt	$	—	$	—	$	—	$	—
State and municipal obligations		764		42,070		—		—
Mortgage-backed securities		2,422		461,658		1,353		141,982
	$	3,186	$	503,728	$	1,353	$	141,982
December 31, 2018:
Securities Available for Sale
Government-sponsored entities debt	$	100	$	10,571	$	652	$	32,959
State and municipal obligations		760		40,387		365		14,231
Mortgage-backed securities		5,182		405,055		18,951		755,223
	$	6,042	$	456,013	$	19,968	$	802,413