Securities (Tables)

12 Months Ended

Dec. 31, 2019

Investments Debt And Equity Securities [Abstract]

Summary of Amortized Cost and Fair Values of Securities Available-for-sale and Held to Maturity

The following tables summarize the amortized cost and fair values of securities available-for-sale, securities held-to-maturity and equity and other securities at December 31, 2019 and 2018 and the corresponding amounts of gross unrealized gains and losses:

2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	41,403	$	427	$	—		$	41,830
U.S. Government agencies		165,162		542		(754	)		164,950
Obligations of states, municipalities, and political    subdivisions		92,806		2,075		(49	)		94,832
Residential mortgage-backed securities
Agency		490,427		2,163		(2,354	)		490,236
Non-agency		109,501		593		(272	)		109,822
Commercial mortgage-backed securities
Agency		159,650		1,092		(1,041	)		159,701
Non-agency		31,144		130		—			31,274
Corporate securities		48,796		571		(37	)		49,330
Asset-backed securities		44,515		—		(198	)		44,317
Total	$	1,183,404	$	7,593	$	(4,705	)	$	1,186,292

2019	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	4,412	$	86	$	—	$	4,498
Total	$	4,412	$	86	$	—	$	4,498

Note 4—Securities (continued)

2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale
U.S. Treasury Notes	$	52,775	$	81	$	(189	)	$	52,667
U.S. Government agencies		187,427		367		(1,296	)		186,498
Obligations of states, municipalities, and political    subdivisions		60,686		133		(586	)		60,233
Residential mortgage-backed securities
Agency		284,038		101		(11,176	)		272,963
Non-agency		84,998		199		(1,576	)		83,621
Commercial mortgage-backed securities
Agency		93,543		55		(3,164	)		90,434
Non-agency		31,458		—		(1,000	)		30,458
Corporate securities		34,716		67		(610	)		34,173
Other securities		4,613		2,127		(131	)		6,609
Total	$	834,254	$	3,130	$	(19,728	)	$	817,656

2018	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Held-to-maturity
Obligations of states, municipalities, and political    subdivisions	$	23,835	$	40	$	(210	)	$	23,665
Residential mortgage-backed securities
Agency		40,082		93		(531	)		39,644
Non-agency		35,349		—		(919	)		34,430
Total	$	99,266	$	133	$	(1,660	)	$	97,739

Summary of Gross Unrealized Losses and Fair Values, Aggregated by Investment Category and Length of Individual Securities Continuous Unrealized Loss Position Available-for-sale and Held to Maturity

Gross unrealized losses and fair values, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2019 and 2018 are summarized as follows:

			Less than 12 Months					12 Months or Longer					Total
2019	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Government agencies		8	$	49,318	$	(662	)	$	20,283	$	(92	)	$	69,601	$	(754	)
Obligations of states, municipalities and    political subdivisions		7		13,309		(45	)		1,419		(4	)		14,728		(49	)
Residential mortgage-backed securities
Agency		50		132,703		(666	)		193,363		(1,688	)		326,066		(2,354	)
Non-agency		9		36,902		(206	)		10,126		(66	)		47,028		(272	)
Commercial mortgage-backed securities
Agency		13		67,649		(563	)		32,678		(478	)		100,327		(1,041	)
Corporate securities		4		6,103		(37	)		—		—			6,103		(37	)
Asset-backed securities		8		37,738		(198	)		—		—			37,738		(198	)
Total		99	$	343,722	$	(2,377	)	$	257,869	$	(2,328	)	$	601,591	$	(4,705	)

			Less than 12 Months					12 Months or Longer					Total
2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Available-for-sale
U.S. Treasury Notes		18	$	23,835	$	(52	)	$	9,865	$	(137	)	$	33,700	$	(189	)
U.S. Government agencies		25		43,487		(80	)		50,101		(1,216	)		93,588		(1,296	)
Obligations of states, municipalities and    political subdivisions		56		13,926		(97	)		18,563		(489	)		32,489		(586	)
Residential mortgage-backed securities
Agency		42		4,288		(45	)		254,121		(11,131	)		258,409		(11,176	)
Non-agency		8		59,107		(1,378	)		4,009		(198	)		63,116		(1,576	)
Commercial mortgage-backed securities
Agency		9		21,356		(447	)		52,640		(2,717	)		73,996		(3,164	)
Non-agency		5		—		—			30,458		(1,000	)		30,458		(1,000	)
Corporate securities		15		25,762		(342	)		4,642		(268	)		30,404		(610	)
Other securities		1		—		—			2,844		(131	)		2,844		(131	)
Total		179	$	191,761	$	(2,441	)	$	427,243	$	(17,287	)	$	619,004	$	(19,728	)

Note 4—Securities (continued)

			Less than 12 Months					12 Months or Longer					Total
2018	# of Securities		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Held-to-maturity
Obligations of states, municipalities, and    political subdivisions		23	$	8,127	$	(58	)	$	8,792	$	(152	)	$	16,919	$	(210	)
Residential mortgage-backed securities
Agency		16		6,625		(150	)		21,139		(381	)		27,764		(531	)
Non-agency		7		21,499		(503	)		12,931		(416	)		34,430		(919	)
Total		46	$	36,251	$	(711	)	$	42,862	$	(949	)	$	79,113	$	(1,660	)

Summary of Proceeds From Sales of Securities Available-for-sale and Associated Gains and Losses

The proceeds from all sales and calls of securities were available-for-sale, and the associated gains and losses for the years ended December 31, 2019, 2018, and 2017 are listed below:

	2019		2018		2017
Proceeds	$	92,103	$	5,134	$	8
Gross gains		1,274		164		8
Gross losses		123		—		—

Schedule of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

At December 31, 2019, the amortized cost and fair value of debt securities are shown by contractual maturity. Expected maturities may differ from contractual maturities if borrowers have the right to call or prepay obligations with or without call or prepayment penalties.

	Amortized Cost		Fair Value
Available-for-sale
Due in one year or less	$	51,901	$	52,093
Due from one to five years		99,605		100,593
Due from five to ten years		136,479		137,843
Due after ten years		104,697		104,730
Mortgage and asset-backed securities		790,722		791,033
Total	$	1,183,404	$	1,186,292
Held-to-maturity
Due from one to five years	$	3,800	$	3,866
Due from five to ten years		612		632
Total	$	4,412	$	4,498