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
March 31, 2020	Cost		Gains		Losses		Fair Value
U.S. government agencies:
Bonds	$	88,299	$	1,437	$	—	$	89,736
Residential mortgage-backed securities		415,399		14,435		—		429,834
Commercial mortgage-backed securities		11,436		967		—		12,403
Collateralized mortgage obligations		385,409		9,634		(1,057)		393,986
States and political subdivisions		44,613		1,746		—		46,359
Totals	$	945,156	$	28,219	$	(1,057)	$	972,318


	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).


	March 31, 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	—	$	—	$	—	2	$	24,937	$	64
Unrealized loss for twelve months or longer	—		—		—	—		—		—
	—		—		—	2		24,937		64
Residential mortgage-backed securities:
Unrealized loss for less than twelve months	—		—		—	37		36,187		87
Unrealized loss for twelve months or longer	—		—		—	2		13,683		58
	—		—		—	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	4		20,214		165	15		94,545		446
Unrealized loss for twelve months or longer	15		58,090		892	13		46,217		369
	19		78,304		1,057	28		140,762		815
States and political subdivisions:
Unrealized loss for less than twelve months	1		537		—	—		—		—
Unrealized loss for twelve months or longer	—		—		—	1		487		—
	1		537		—	1		487		—
Total available for sale:
Unrealized loss for less than twelve months	5		20,751		165	55		165,636		599
Unrealized loss for twelve months or longer	15		58,090		892	16		60,387		427
	20	$	78,841	$	1,057	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 March 31, 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	$	2,071	$	2,090	$	453	$	456
Due after one year through five years		73,668		75,246		987		994
Due after five years through ten years		35,387		35,914		6,160		6,264
Due after ten years		21,786		22,845		63,662		64,748
		132,912		136,095		71,262		72,462

Residential mortgage-backed securities		415,399		429,834		16,809		17,485
Collateralized mortgage obligations		385,409		393,986		106,926		109,149
Commercial mortgage-backed securities		11,436		12,403		160,113		170,518
	$	945,156	$	972,318	$	355,110	$	369,614