Investment Securities (Tables)

9 Months Ended

Sep. 30, 2018

Investments [Abstract]

Amortized Cost And Fair Value Of Investment Securities

	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
September 30, 2018
Securities available for sale:
U.S. Government agency and government sponsored enterprises	$	157,786		—	$	5,977	$	151,809
Mortgage-backed securities:
Federal National Mortgage Association		275,416		39		10,778		264,677
Federal Home Loan Mortgage Corporation		37,088		10		1,847		35,251
Government National Mortgage Association		5,650		21		126		5,545
Collateralized mortgage obligations:
Federal National Mortgage Association		139		—		—		139
Federal Home Loan Mortgage Corporation		39		—		—		39
Privately issued		—		850		—		850
Total mortgage-backed securities		318,332		920		12,751		306,501
Total available for sale securities	$	476,118	$	920	$	18,728	$	458,310
Securities held to maturity:
State and political subdivisions		241,637		519		2,192		239,964
Mortgage-backed securities:
Federal National Mortgage Association		12,032		—		467		11,565
Federal Home Loan Mortgage Corporation		4,616		—		272		4,344
Government National Mortgage Association		35,708		—		1,253		34,455
Collateralized mortgage obligations:
Federal National Mortgage Association		65,130		—		3,270		61,860
Federal Home Loan Mortgage Corporation		81,676		—		4,103		77,573
Government National Mortgage Association		18,824		—		867		17,957
Total mortgage-backed securities		217,986		—		10,232		207,754
Total held to maturity securities	$	459,623	$	519	$	12,424	$	447,718
December 31, 2017
Securities available for sale:
U.S. Government agency and government sponsored enterprises	$	163,025	$	122	$	1,258	$	161,889
Mortgage-backed securities:
Federal National Mortgage Association		311,830		313		3,220		308,923
Federal Home Loan Mortgage Corporation		41,290		76		675		40,691
Government National Mortgage Association		12,051		193		12		12,232
Collateralized mortgage obligations:
Federal National Mortgage Association		217		1		1		217
Federal Home Loan Mortgage Corporation		45		—		—		45
Privately issued		—		976		—		976
Total mortgage-backed securities		365,433		1,559		3,908		363,084
Total available for sale securities	$	528,458	$	1,681	$	5,166	$	524,973

(4.)INVESTMENT SECURITIES (Continued)

	Amortized		Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
December 31, 2017 (continued)
Securities held to maturity:
State and political subdivisions		283,557		2,317		662		285,212
Mortgage-backed securities:
Federal National Mortgage Association		9,732		16		88		9,660
Federal Home Loan Mortgage Corporation		3,213		—		119		3,094
Government National Mortgage Association		26,841		—		330		26,511
Collateralized mortgage obligations:
Federal National Mortgage Association		76,432		—		1,958		74,474
Federal Home Loan Mortgage Corporation		93,810		3		2,165		91,648
Government National Mortgage Association		22,881		5		502		22,384
Total mortgage-backed securities		232,909		24		5,162		227,771
Total held to maturity securities	$	516,466	$	2,341	$	5,824	$	512,983

Sales And Calls Of Securities Available For Sale

	Three months ended September 30,				Nine months ended September 30,
	2018		2017		2018		2017
Proceeds from sales	$	21,470	$	24,117	$	27,238	$	49,424
Gross realized gains		64		190		73		606
Gross realized losses		159		6		161		6

Scheduled Maturities Of Securities Available For Sale And Securities Held To Maturity

	Amortized		Fair
	Cost		Value
Debt securities available for sale:
Due in one year or less	$	35,676	$	35,471
Due from one to five years		139,223		135,043
Due after five years through ten years		214,640		204,681
Due after ten years		86,579		83,115
Total available for sale securities	$	476,118	$	458,310
Debt securities held to maturity:
Due in one year or less	$	49,829	$	49,878
Due from one to five years		150,749		150,479
Due after five years through ten years		83,277		79,898
Due after ten years		175,768		167,463
Total held to maturity securities	$	459,623	$	447,718

Investments Gross Unrealized Losses And Fair Value

	Less than 12 months				12 months or longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
September 30, 2018
Securities available for sale:
U.S. Government agency and government sponsored    enterprises	$	88,647	$	2,621	$	63,162	$	3,356	$	151,809	$	5,977
Mortgage-backed securities:
Federal National Mortgage Association		54,316		1,380		208,371		9,398		262,687		10,778
Federal Home Loan Mortgage Corporation		2,374		80		32,041		1,767		34,415		1,847
Government National Mortgage Association		4,125		121		742		5		4,867		126
Collateralized mortgage obligations:
Federal National Mortgage Association		—		—		58		—		58		—
Federal Home Loan Mortgage Corporation		—		—		6		—		6		—
Total mortgage-backed securities		60,815		1,581		241,218		11,170		302,033		12,751
Total available for sale securities		149,462		4,202		304,380		14,526		453,842		18,728
Securities held to maturity:
State and political subdivisions		105,290		858		28,646		1,334		133,936		2,192
Mortgage-backed securities:
Federal National Mortgage Association		5,467		151		6,098		316		11,565		467
Federal Home Loan Mortgage Corporation		1,455		30		2,889		242		4,344		272
Government National Mortgage Association		17,258		374		17,197		879		34,455		1,253
Collateralized mortgage obligations:
Federal National Mortgage Association		1,982		41		59,878		3,229		61,860		3,270
Federal Home Loan Mortgage Corporation		9,845		390		67,728		3,713		77,573		4,103
Government National Mortgage Association		1,020		15		16,937		852		17,957		867
Total mortgage-backed securities		37,027		1,001		170,727		9,231		207,754		10,232
Total held to maturity securities		142,317		1,859		199,373		10,565		341,690		12,424
Total temporarily impaired securities	$	291,779	$	6,061	$	503,753	$	25,091	$	795,532	$	31,152
December 31, 2017
Securities available for sale:
U.S. Government agencies and government sponsored    enterprises	$	95,046	$	571	$	31,561	$	687	$	126,607	$	1,258
Mortgage-backed securities:
Federal National Mortgage Association		201,754		1,855		67,383		1,365		269,137		3,220
Federal Home Loan Mortgage Corporation		20,446		192		15,601		483		36,047		675
Government National Mortgage Association		2,432		—		880		12		3,312		12
Collateralized mortgage obligations:
Federal National Mortgage Association		—		—		119		1		119		1
Federal Home Loan Mortgage Corporation		—		—		8		—		8		—
Total mortgage-backed securities		224,632		2,047		83,991		1,861		308,623		3,908
Total available for sale securities		319,678		2,618		115,552		2,548		435,230		5,166

(4.)INVESTMENT SECURITIES (Continued)

	Less than 12 months				12 months or longer				Total
	Fair		Unrealized		Fair		Unrealized		Fair		Unrealized
	Value		Losses		Value		Losses		Value		Losses
December 31, 2017 (continued)
Securities held to maturity:
State and political subdivisions		36,368		295		14,492		367		50,860		662
Mortgage-backed securities:
Federal National Mortgage Association		3,766		29		2,694		59		6,460		88
Federal Home Loan Mortgage Corporation		—		—		3,094		119		3,094		119
Government National Mortgage Association		17,327		136		9,184		194		26,511		330
Collateralized mortgage obligations:
Federal National Mortgage Association		16,830		202		57,645		1,756		74,475		1,958
Federal Home Loan Mortgage Corporation		23,727		337		66,467		1,828		90,194		2,165
Government National Mortgage Association		15,401		340		5,635		162		21,036		502
Total mortgage-backed securities		77,051		1,044		144,719		4,118		221,770		5,162
Total held to maturity securities		113,419		1,339		159,211		4,485		272,630		5,824
Total temporarily impaired securities	$	433,097	$	3,957	$	274,763	$	7,033	$	707,860	$	10,990