Securities (Tables)

12 Months Ended

Dec. 31, 2021

Gain (Loss) on Securities [Line Items]

Summary of Investments

The following tables present the amortized cost, gross unrealized holding gains, gross unrealized holding losses, ACL on securities and fair value of securities by major security type and class of security:

(Dollars in thousands)
December 31, 2021	Amortized Cost	Unrealized Gains	Unrealized Losses	Allowance for Credit Losses	Fair Value
Available for Sale Debt Securities:
Obligations of U.S. government-sponsored enterprises	$200,953	$12	($4,511)	$—	$196,454
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	828,319	6,850	(10,207)	—	824,962
Individual name issuer trust preferred debt securities	9,373	—	(235)	—	9,138
Corporate bonds	13,155	—	(850)	—	12,305
Total available for sale debt securities	$1,051,800	$6,862	($15,803)	$—	$1,042,859

(Dollars in thousands)
December 31, 2020	Amortized Cost	Unrealized Gains	Unrealized Losses	Allowance for Credit Losses	Fair Value
Available for Sale Debt Securities:
Obligations of U.S. government-sponsored enterprises	$131,186	$628	($145)	$—	$131,669
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	725,890	14,942	(527)	—	740,305
Individual name issuer trust preferred debt securities	13,341	—	(672)	—	12,669
Corporate bonds	11,153	—	(1,225)	—	9,928
Total available for sale debt securities	$881,570	$15,570	($2,569)	$—	$894,571

Securities by Contractual Maturity

The schedule of maturities of available for sale debt securities is presented below. Mortgage-backed securities are included based on weighted average maturities, adjusted for anticipated prepayments.  All other debt securities are included based on contractual maturities.  Actual maturities may differ from amounts presented because certain issuers have the right to call or prepay obligations with or without call or prepayment penalties.

(Dollars in thousands)	Available for Sale
December 31, 2021	Amortized Cost	Fair Value
Due in one year or less	$159,936	$159,288
Due after one year to five years	383,094	381,503
Due after five years to ten years	403,300	397,503
Due after ten years	105,470	104,565
Total securities	$1,051,800	$1,042,859

Schedule of Realized Gain (Loss)

The following table summarizes amounts relating to sales of securities:

(Dollars in thousands)
For the periods ended December 31,	2021	2020	2019
Proceeds from sales	$—	$—	$11,877
Gross realized gains	$—	$—	$—
Gross realized losses	—	—	(53)
Net realized losses on securities	$—	$—	($53)

Securities in a Continuous Unrealized Loss Position

The following tables summarize temporarily impaired securities, segregated by length of time the securities have been in a continuous unrealized loss position:

(Dollars in thousands)	Less than 12 Months			12 Months or Longer			Total
December 31, 2021	#	Fair Value	Unrealized Losses	#	Fair Value	Unrealized Losses	#	Fair Value	Unrealized Losses
Obligations of U.S. government-sponsored enterprises	12	$152,733	($3,313)	6	$43,202	($1,198)	18	$195,935	($4,511)
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	41	514,419	(7,270)	21	108,983	(2,937)	62	623,402	(10,207)
Individual name issuer trust preferred debt securities	—	—	—	3	9,138	(235)	3	9,138	(235)
Corporate bonds	—	—	—	4	12,305	(850)	4	12,305	(850)
Total temporarily impaired securities	53	$667,152	($10,583)	34	$173,628	($5,220)	87	$840,780	($15,803)

(Dollars in thousands)	Less than 12 Months			12 Months or Longer			Total
December 31, 2020	#	Fair Value	Unrealized Losses	#	Fair Value	Unrealized Losses	#	Fair Value	Unrealized Losses
Obligations of U.S. government-sponsored enterprises	6	$63,856	($145)	—	$—	$—	6	$63,856	($145)
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	16	107,283	(527)	—	—	—	16	107,283	(527)
Individual name issuer trust preferred debt securities	—	—	—	5	12,669	(672)	5	12,669	(672)
Corporate bonds	—	—	—	3	9,928	(1,225)	3	9,928	(1,225)
Total temporarily impaired securities	22	$171,139	($672)	8	$22,597	($1,897)	30	$193,736	($2,569)