Investments (Tables)

9 Months Ended

Sep. 30, 2020

Investments [Abstract]

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

	September 30, 2020								December 31, 2019
	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
Obligations of states and
political subdivisions	255,677		8,369		744		263,302		112,393		4,800		6		117,187
Mortgage-backed securities:
U.S. government agencies	804,912		38,459		138		843,233		631,637		12,292		1,825		642,104
Private label	10,375		1,002		—		11,377		10,896		589		—		11,485
Trust preferred securities	4,554		—		662		3,892		4,781		27		347		4,461
Corporate securities	31,515		1,859		20		33,354		31,669		500		43		32,126
Total Debt Securities	1,107,033		49,689		1,564		1,155,158		791,876		18,210		2,221		807,865
Certificates of deposit held for investment	2,241		—		—		2,241		2,241		—		—		2,241
Total Securities Available-for-Sale	$	1,109,274	$	49,689	$	1,564	$	1,157,399	$	794,117	$	18,210	$	2,221	$	810,106

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
Total Securities Held-to-Maturity	$	—	$	—	$	—	$	—	$	49,036	$	1,562	$	—	$	50,598

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):

	September 30, 2020
	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	$	55,480	$	744	$	—	$	—	$	55,480	$	744
Mortgage-backed securities:
U.S. Government agencies	62,156		138		36		—		62,192		138
Trust preferred securities	—		—		3,892		662		3,892		662
Corporate securities	469		20		—		—		469		20
Total available-for-sale	$	118,105	$	902	$	3,928	$	662	$	122,033	$	1,564

	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

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

The amortized cost and estimated fair value of debt securities at September 30, 2020, 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.

	Amortized Cost		Estimated Fair Value
Available-for-Sale Debt Securities
Due in one year or less	$	2,261	$	2,270
Due after one year through five years	16,269		16,817
Due after five years through ten years	288,225		305,691
Due after ten years	800,278		830,380
Total	$	1,107,033	$	1,155,158

Gross Gains And Losses Realized

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

	Three months ended September 30,				Nine months ended September 30,
	2020		2019		2020		2019
Gross realized gains on securities sold	$	—	$	116	$	133	$	226
Gross realized losses on securities sold	—		(156)		(77)		(157)
Net investment security (losses) gains	$	—	$	(40)	$	56	$	69
Gross unrealized gains recognized on equity securities still held	$	461	$	14	$	170	$	255
Gross unrealized losses recognized on equity securities still held	—		(228)		(1,868)		(282)
Net unrealized gains (losses) recognized on equity securities still held	$	461	$	(214)	$	(1,698)	$	(27)