Securities

Summary of amortized cost and fair value of available for sale securities

The amortized cost and fair value of available for sale and held to maturity securities are summarized as follows (in thousands).


	Available for Sale
	Amortized		Unrealized		Unrealized
June 30, 2020	Cost		Gains		Losses		Fair Value
U.S. government agencies:
Bonds	$	61,915	$	1,315	$	—	$	63,230
Residential mortgage-backed securities		535,874		17,015		(181)		552,708
Commercial mortgage-backed securities		18,685		846		—		19,531
Collateralized mortgage obligations		400,298		9,088		(252)		409,134
States and political subdivisions		44,324		2,421		—		46,745
Totals	$	1,061,096	$	30,685	$	(433)	$	1,091,348


	Available for Sale
	Amortized		Unrealized		Unrealized
December 31, 2019	Cost		Gains		Losses		Fair Value
U.S. government agencies:
Bonds	$	84,590	$	1,049	$	(64)	$	85,575
Residential mortgage-backed securities		430,514		6,662		(147)		437,029
Commercial mortgage-backed securities		11,488		543		—		12,031
Collateralized mortgage obligations		333,256		3,175		(815)		335,616
States and political subdivisions		39,969		1,273		—		41,242
Totals	$	899,817	$	12,702	$	(1,026)	$	911,493

Schedule of information regarding available for sale securities that were in an unrealized loss position

Information regarding available for sale and held to maturity securities that were in an unrealized loss position is shown in the following tables (dollars in thousands).


	June 30, 2020					December 31, 2019
	Number of			Unrealized		Number of			Unrealized
	Securities	Fair Value		Losses		Securities	Fair Value		Losses
Available for Sale
U.S. government agencies:
Bonds:
Unrealized loss for less than twelve months	1	$	5,000	$	—	2	$	24,937	$	64
Unrealized loss for twelve months or longer	—		—		—	—		—		—
	1		5,000		—	2		24,937		64
Residential mortgage-backed securities:
Unrealized loss for less than twelve months	2		25,819		181	37		36,187		87
Unrealized loss for twelve months or longer	—		—		—	2		13,683		58
	2		25,819		181	39		49,870		145
Commercial mortgage-backed securities:
Unrealized loss for less than twelve months	—		—		—	1		9,967		2
Unrealized loss for twelve months or longer	—		—		—	—		—		—
	—		—		—	1		9,967		2
Collateralized mortgage obligations:
Unrealized loss for less than twelve months	2		7,981		20	15		94,545		446
Unrealized loss for twelve months or longer	12		53,162		232	13		46,217		369
	14		61,143		252	28		140,762		815
States and political subdivisions:
Unrealized loss for less than twelve months	—		—		—	—		—		—
Unrealized loss for twelve months or longer	—		—		—	1		487		—
	—		—		—	1		487		—
Total available for sale:
Unrealized loss for less than twelve months	5		38,800		201	55		165,636		599
Unrealized loss for twelve months or longer	12		53,162		232	16		60,387		427
	17	$	91,962	$	433	71	$	226,023	$	1,026

Schedule of amortized cost and fair value of securities, excluding trading and equity available for sale securities, by contractual maturity

The amortized cost and fair value of securities, excluding trading and equity securities, at June 30, 2020 are shown by contractual maturity below (in thousands).


	Available for Sale				Held to Maturity
	Amortized				Amortized
	Cost		Fair Value		Cost		Fair Value
Due in one year or less	$	6,056	$	6,065	$	452	$	456
Due after one year through five years		58,432		60,042		987		996
Due after five years through ten years		20,229		20,987		7,068		7,313
Due after ten years		21,522		22,881		62,977		64,841
		106,239		109,975		71,484		73,606

Residential mortgage-backed securities		535,874		552,708		15,693		16,539
Collateralized mortgage obligations		400,298		409,134		96,413		98,844
Commercial mortgage-backed securities		18,685		19,531		159,608		170,553
	$	1,061,096	$	1,091,348	$	343,198	$	359,542