Investments (Tables)

12 Months Ended

Dec. 31, 2019

Investments [Abstract]

Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities

	December 31, 2019								December 31, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Securities available-for-sale:
U.S. Treasuries and U.S.
government agencies	$	500	$	2	$	—	$	502	$	5,713	$	20	$	—	$	5,733
Obligations of states and
political subdivisions	112,393		4,800		6		117,187		128,089		1,033		1,052		128,070
Mortgage-backed securities:
U.S. government agencies	631,637		12,292		1,825		642,104		561,799		1,950		12,991		550,758
Private label	10,896		589		—		11,485		11,948		95		—		12,043
Trust preferred securities	4,781		27		347		4,461		4,774		25		—		4,799
Corporate securities	31,669		500		43		32,126		16,795		30		167		16,658
Total Debt Securities	791,876		18,210		2,221		807,865		729,118		3,153		14,210		718,061
Certificates of deposit held for investment	2,241		—		—		2,241		3,735		—		—		3,735
Total Securities
Available-for-Sale	$	794,117	$	18,210	$	2,221	$	810,106	$	732,853	$	3,153	$	14,210	$	721,796

Aggregate Carrying And Approximate Market Values Of Held-To-Maturity Securities

Securities held-to-maturity:
Mortgage-backed securities:
U.S. government agencies	$	49,036	$	1,562	$	—	$	50,598	$	56,827	$	173	$	294	$	56,706
Trust preferred securities	—		—		—		—		4,000		—		—		4,000
Total Securities
Held-to-Maturity	$	49,036	$	1,562	$	—	$	50,598	$	60,827	$	173	$	294	$	60,706

Gross Unrealized Losses And Fair Value Of Investments

The following table shows the gross unrealized losses and fair value of the Company’s investments aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position (in thousands):  

	December 31, 2019
	Less Than Twelve Months				Twelve Months or Greater				Total
	Estimated Fair Value		Unrealized Loss		Estimated Fair Value		Unrealized Loss		Estimated Fair Value		Unrealized Loss
Securities available-for-sale:
Obligations of states and political subdivisions	$	230	$	—	$	1,439	$	6	$	1,669	$	6
Mortgage-backed securities:
U.S. Government agencies	123,289		1,247		34,746		578		158,035		1,825
Trust preferred securities	4,200		347		—		—		4,200		347
Corporate securities	11,248		43		—		—		11,248		43
Total available-for-sale	$	138,967	$	1,637	$	36,185	$	584	$	175,152	$	2,221

There were no held-to-maturity securities in an unrealized loss position as of December 31, 2019.

	December 31, 2018
	Less Than Twelve Months				Twelve Months or Greater				Total
	Estimated Fair Value		Unrealized Loss		Estimated Fair Value		Unrealized Loss		Estimated Fair Value		Unrealized Loss
Securities available-for-sale:
Obligations of states and political subdivisions	$	11,837	$	272	$	22,068	$	780	$	33,905	$	1,052
Mortgage-backed securities:
U.S. Government agencies	84,975		1,593		282,560		11,398		367,535		12,991
Corporate securities	12,995		167		—		—		12,995		167
Total available-for-sale	$	109,807	$	2,032	$	304,628	$	12,178	$	414,435	$	14,210
Securities held-to-maturity:
Mortgage-backed securities:
U.S. Government agencies	$	28,274	$	126	$	5,960	$	168	$	34,234	$	294
Total held-to-maturity	$	28,274	$	126	$	5,960	$	168	$	34,234	$	294

Amortized Cost And Estimated Fair Value Of Debt Securities By Contractual Maturity

The amortized cost and estimated fair value of debt securities at December 31, 2019, by contractual maturity, are shown in the following table (in thousands).  Expected maturities will differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.  Mortgage-backed securities have been allocated to their respective maturity groupings based on their contractual maturity.

	Cost		Estimated Fair Value
Securities Available-for-Sale
Due in one year or less	$	1,610	$	1,620
Due after one year through five years	16,578		17,017
Due after five years through ten years	213,829		217,872
Due after ten years	559,859		571,356
	$	791,876	$	807,865
Securities Held-to-Maturity
Due in one year or less	$	—	$	—
Due after one year through five years	—		—
Due after five years through ten years	4,937		5,241
Due after ten years	44,099		45,357
	$	49,036	$	50,598

Gross Gains And Losses Realized

Gross gains and gross losses realized by the Company from investment security transactions are summarized in the table below (in thousands): 

	For the year ended December 31,
	2019			2018			2017
Gross unrealized gains recognized on securities still held	$	888		$	208		$	—
Gross unrealized losses recognized on securities still held	—			(298		)	—
Net unrealized (losses) gains recognized on securities still held	$	888		$	(90	)	$	—
Gross realized gains	$	226		$	—		$	4,476
Gross realized losses	(157		)	—			—
Net realized investment security gains	$	69		$	—		$	4,476