Loans, Allowance for Credit Losses and Credit Quality (Tables)

3 Months Ended

Mar. 31, 2021

Receivables [Abstract]

Financing Receivable, Allowance for Credit Loss [Table Text Block]

The following table summarizes the change in allowance for credit losses by loan category, and bifurcates the amount of loans allocated to each loan category for the period indicated:

	Three Months Ended March 31, 2021
	(Dollars in thousands)
	Commercial and Industrial		Commercial Real Estate		Commercial Construction		Small Business		Residential Real Estate		Home  Equity		Other Consumer		Total
Allowance for credit losses
Beginning balance	$	21,086	$	45,009	$	5,397	$	5,095	$	14,275	$	22,060	$	470	$	113,392
Charge-offs	(3,331)		—		—		(66)		—		—		(289)		(3,686)
Recoveries	64		57		—		11		1		13		197		343
Provision for credit loss expense	2,388		(718)		(129)		(1,419)		(1,320)		(1,357)		55		(2,500)
Ending balance (1)	$	20,207	$	44,348	$	5,268	$	3,621	$	12,956	$	20,716	$	433	$	107,549
	Three Months Ended March 31, 2020
	(Dollars in thousands)
	Commercial and Industrial		Commercial Real Estate		Commercial Construction		Small Business		Residential Real Estate		Home  Equity		Other Consumer		Total
Allowance for credit losses
Beginning balance, pre adoption of ASU 2016-13	$	17,594	$	32,935	$	6,053	$	1,746	$	3,440	$	5,576	$	396	$	67,740
Cumulative effect accounting adjustment (2)	(1,984)		(13,048)		(3,652)		495		9,828		7,012		212		(1,137)
Cumulative effect accounting adjustment (3)	49		337		—		—		423		319		29		1,157
Charge-offs	—		—		—		(109)		—		(138)		(487)		(734)
Recoveries	42		—		—		3		1		58		246		350
Provision for credit loss expense	5,948		9,274		1,346		1,694		1,155		5,083		500		25,000
Ending balance (1)	$	21,649	$	29,498	$	3,747	$	3,829	$	14,847	$	17,910	$	896	$	92,376

(1)Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $33.4 million and $25.9 million as of March 31, 2021 and March 31, 2020, respectively.

(2)Represents adjustment needed to reflect the cumulative day one impact pursuant to the Company's adoption of Accounting Standards Update 2016-13. The adjustment represents a $1.1 million decrease to the allowance attributable to the change in accounting methodology for estimating the allowance for credit losses resulting from the Company's adoption of the standard.

(3)Represents adjustment needed to reflect the day one reclassification of the Company's PCI loan balances to PCD and the associated gross-up, pursuant to the Company's adoption of Accounting Standards Update 2016-13. The adjustment represents a $1.2 million increase to the allowance resulting from the day one reclassification.

Financing Receivable Credit Quality Indicators [Table Text Block]

The following table details the amortized cost balances of the Company's loan portfolios, presented by credit quality indicator and origination year as of the dates indicated below:

	March 31, 2021
	2021		2020		2019		2018		2017		Prior		Revolving Loans		Revolving converted to Term		Total
	(Dollars in thousands)
Commercial and industrial
Pass (1)	$	420,682	$	724,577	$	127,454	$	88,970	$	25,737	$	27,123	$	589,448	$	—	$	2,003,991
Potential weakness	3,424		14,991		2,636		2,148		4,288		3,205		12,252		—		42,944
Definite weakness - loss unlikely	17,912		663		1,116		1,327		2,768		482		6,927		—		31,195
Partial loss probable	—		—		—		—		—		143		8,398		—		8,541
Definite loss	—		—		—		—		—		—		—		—		—
Total commercial and industrial	$	442,018	$	740,231	$	131,206	$	92,445	$	32,793	$	30,953	$	617,025	$	—	$	2,086,671
Commercial real estate
Pass	$	214,573	$	1,043,424	$	687,959	$	432,728	$	524,194	$	966,331	$	16,196	$	—	$	3,885,405
Potential weakness	390		29,218		53,849		31,274		18,981		86,160		13,612		—		233,484
Definite weakness - loss unlikely	3,590		22,536		3,754		3,474		9,892		15,482		—		—		58,728
Partial loss probable	—		—		—		—		—		—		—		—		—
Definite loss	—		—		—		—		—		—		—		—		—
Total commercial real estate	$	218,553	$	1,095,178	$	745,562	$	467,476	$	553,067	$	1,067,973	$	29,808	$	—	$	4,177,617
Commercial construction
Pass	$	28,323	$	239,954	$	142,076	$	28,189	$	23,313	$	6,628	$	19,934	$	—	$	488,417
Potential weakness	—		17,544		9,691		—		—		—		190		—		27,425
Definite weakness - loss unlikely	—		—		—		520		—		—		—		—		520
Partial loss probable	—		—		—		—		—		—		—		—		—
Definite loss	—		—		—		—		—		—		—		—		—
Total commercial construction	$	28,323	$	257,498	$	151,767	$	28,709	$	23,313	$	6,628	$	20,124	$	—	$	516,362
Small business
Pass	$	10,307	$	41,418	$	25,817	$	17,750	$	12,624	$	29,309	$	33,658	$	—	$	170,883
Potential weakness	—		—		389		204		10		202		634		—		1,439
Definite weakness - loss unlikely	—		677		51		59		17		301		758		—		1,863
Partial loss probable	—		—		—		—		—		—		26		—		26
Definite loss	—		—		—		—		—		—		—		—		—
Total small business	$	10,307	$	42,095	$	26,257	$	18,013	$	12,651	$	29,812	$	35,076	$	—	$	174,211
Residential real estate
Pass	$	80,657	$	212,891	$	126,359	$	133,150	$	130,580	$	554,848	$	—	$	—	$	1,238,485
Default	—		—		—		427		—		2,877		—		—		3,304
Total residential real estate	$	80,657	$	212,891	$	126,359	$	133,577	$	130,580	$	557,725	$	—	$	—	$	1,241,789
Home equity
Pass	$	23,583	$	77,497	$	51,398	$	46,648	$	48,132	$	140,376	$	636,881	$	1,762	$	1,026,277
Default	—		—		—		—		—		210		2,008		—		2,218
Total home equity	$	23,583	$	77,497	$	51,398	$	46,648	$	48,132	$	140,586	$	638,889	$	1,762	$	1,028,495
Other consumer
Pass	$	46	$	540	$	326	$	146	$	620	$	6,800	$	12,939	$	—	$	21,417

Default	—		—		—		—		15		111		3		—		129
Total other consumer	$	46	$	540	$	326	$	146	$	635	$	6,911	$	12,942	$	—	$	21,546
Total	$	803,487	$	2,425,930	$	1,232,875	$	787,014	$	801,171	$	1,840,588	$	1,353,864	$	1,762	$	9,246,691

	March 31, 2020
	2020		2019		2018		2017		2016		Prior		Revolving Loans		Revolving converted to Term		Total
	(Dollars in thousands)
Commercial and industrial
Pass (1)	$	119,886	$	213,925	$	138,376	$	50,323	$	36,685	$	33,576	$	736,304	$	327	$	1,329,402
Potential weakness	362		5,432		1,489		4,909		725		697		21,780		50		35,444
Definite weakness - loss unlikely	495		2,128		26,006		5,589		2,604		1,575		44,932		—		83,329
Partial loss probable	—		—		—		—		—		49		—		—		49
Definite loss	—		—		—		—		—		—		—		—		—
Total commercial and industrial	$	120,743	$	221,485	$	165,871	$	60,821	$	40,014	$	35,897	$	803,016	$	377	$	1,448,224
Commercial real estate
Pass	$	260,217	$	943,205	$	586,125	$	651,335	$	468,824	$	945,248	$	48,056	$	2,987	$	3,905,997
Potential weakness	1,809		8,303		33,755		8,506		9,851		42,382		—		—		104,606
Definite weakness - loss unlikely	—		3,612		7,432		20,395		6,993		12,312		—		—		50,744
Partial loss probable	—		—		—		—		—		—		—		—		—
Definite loss	—		—		—		—		—		—		—		—		—
Total commercial real estate	$	262,026	$	955,120	$	627,312	$	680,236	$	485,668	$	999,942	$	48,056	$	2,987	$	4,061,347
Commercial construction
Pass	$	43,369	$	221,773	$	114,561	$	73,493	$	—	$	6,867	$	44,225	$	325	$	504,613
Potential weakness	—		554		347		19,044		—		—		347		—		20,292
Definite weakness - loss unlikely	—		—		1,887		—		—		—		346		—		2,233
Partial loss probable	—		—		—		—		—		—		—		—		—
Definite loss	—		—		—		—		—		—		—		—		—
Total commercial construction	$	43,369	$	222,327	$	116,795	$	92,537	$	—	$	6,867	$	44,918	$	325	$	527,138
Small business
Pass	$	8,414	$	31,651	$	25,184	$	17,848	$	17,594	$	26,734	$	47,109	$	—	$	174,534
Potential weakness	—		12		18		13		753		259		597		—		1,652
Definite weakness - loss unlikely	—		47		133		51		169		598		636		—		1,634
Partial loss probable	—		—		—		—		—		—		—		—		—
Definite loss	—		—		—		—		—		—		—		—		—
Total small business	$	8,414	$	31,710	$	25,335	$	17,912	$	18,516	$	27,591	$	48,342	$	—	$	177,820
Residential real estate
Pass	$	39,122	$	204,524	$	260,899	$	210,662	$	283,255	$	523,742	$	—	$	—	$	1,522,204
Default	—		—		427		435		—		5,350		—		—		6,212
Total residential real estate	$	39,122	$	204,524	$	261,326	$	211,097	$	283,255	$	529,092	$	—	$	—	$	1,528,416
Home equity
Pass	$	23,397	$	75,161	$	70,081	$	67,740	$	51,106	$	138,733	$	715,169	$	1,853	$	1,143,240
Default	—		—		—		18		—		579		2,372		61		3,030
Total home equity	$	23,397	$	75,161	$	70,081	$	67,758	$	51,106	$	139,312	$	717,541	$	1,914	$	1,146,270

Other consumer
Pass	$	414	$	705	$	356	$	1,049	$	1,000	$	10,850	$	12,767	$	—	$	27,141
Default	—		—		—		19		—		39		16		—		74
Total other consumer	$	414	$	705	$	356	$	1,068	$	1,000	$	10,889	$	12,783	$	—	$	27,215
Total	$	497,485	$	1,711,032	$	1,267,076	$	1,131,429	$	879,559	$	1,749,590	$	1,674,656	$	5,603	$	8,916,430

(1)Loans originated as part of the Paycheck Protection Program ("PPP") established by the CARES Act are included within commercial and industrial under the 2021 and 2020 vintage year and "pass" category as these loans are 100% guaranteed by the U.S. Government. Outstanding PPP loans totaled $846.3 million as of March 31, 2021, including $506.3 million and $340.0 million originated in 2020 and 2021, respectively.

Foreclosed Residential Real Estate Property [Table Text Block]

The following table shows information regarding foreclosed residential real estate property at the dates indicated:

	March 31, 2021		December 31, 2020
	(Dollars in thousands)
Foreclosed residential real estate property held by the creditor	$	—	$	—
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$	1,628	$	1,750

Financing Receivable Credit Quality Indicators For Consumer And Residential Portfolio Table Text Block

The following table shows the weighted average FICO scores and the weighted average combined LTV ratios at the dates indicated below:

	March 31 2021		December 31 2020
Residential portfolio
FICO score (re-scored)(1)	749		749
LTV (re-valued)(2)	56.5	%	57.4	%
Home equity portfolio
FICO score (re-scored)(1)	772		771
LTV (re-valued)(2)(3)	45.9	%	46.0	%

(1)The average FICO scores at March 31, 2021 are based upon rescores from March 2021, as available for previously originated loans, or origination score data for loans booked in March 2021.  The average FICO scores at December 31, 2020 were based upon rescores available from December 2020, as available for previously originated loans, or origination score data for loans booked in December 2020.

(2)The combined LTV ratios for March 31, 2021 are based upon updated automated valuations as of February 2021, when available, and/or the most current valuation data available.  The combined LTV ratios for December 31, 2020 were based upon updated automated valuations as of November 2020, when available, and/or the most current valuation data available as of such date.  The updated automated valuations provide new information on loans that may be available since the previous valuation was obtained.  If no new information is available, the valuation will default to the previously obtained data or most recent appraisal.

(3)For home equity loans and lines in a subordinate lien, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.

Financing Receivable, Past Due [Table Text Block]

The following tables show the age analysis of past due financing receivables as of the dates indicated:

	March 31, 2021
	30-59 days			60-89 days			90 days or more			Total Past Due					Total Financing Receivables		Amortized Cost >90 Days and  Accruing
	Number of Loans	Principal Balance		Number of Loans	Principal Balance		Number of Loans	Principal Balance		Number of Loans	Principal Balance		Current
	(Dollars in thousands)
Loan Portfolio
Commercial and industrial	6	$	510	—	$	—	10	$	141	16	$	651	$	2,086,020	$	2,086,671	$	—
Commercial real estate	3	888		—	—		4	511		7	1,399		4,176,218		4,177,617		—
Commercial construction	—	—		—	—		—	—		—	—		516,362		516,362		—
Small business	5	56		1	2		3	36		9	94		174,117		174,211		—
Residential real estate	9	1,252		3	764		28	3,837		40	5,853		1,235,936		1,241,789		—
Home equity	7	425		2	87		27	2,217		36	2,729		1,025,766		1,028,495		—
Other consumer (1)	196	167		1	1		7	130		204	298		21,248		21,546		1
Total	226	$	3,298	7	$	854	79	$	6,872	312	$	11,024	$	9,235,667	$	9,246,691	$	1

	December 31, 2020
	30-59 days			60-89 days			90 days or more			Total Past Due					Total Financing Receivables		Recorded Investment >90 Days and  Accruing
	Number of Loans	Principal Balance		Number of Loans	Principal Balance		Number of Loans	Principal Balance		Number of Loans	Principal Balance		Current
	(Dollars in thousands)
Loan Portfolio
Commercial and industrial	2	$	318	1	$	672	8	$	785	11	$	1,775	$	2,101,377	$	2,103,152	$	—
Commercial real estate	3	409		—	—		4	515		7	924		4,173,003		4,173,927		—
Commercial construction	—	—		2	2,794		—	—		2	2,794		551,135		553,929		—
Small business	14	421		6	273		4	59		24	753		174,270		175,023		—
Residential real estate	12	2,150		8	5,507		27	3,648		47	11,305		1,284,878		1,296,183		—
Home equity	10	733		5	203		33	2,633		48	3,569		1,065,221		1,068,790		—
Other consumer (1)	260	137		3	1		6	138		269	276		21,586		21,862		1
Total	301	$	4,168	25	$	9,450	82	$	7,778	408	$	21,396	$	9,371,470	$	9,392,866	$	1

(1)Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances.

Financing Receivable, Nonaccrual [Table Text Block]

The following table shows information regarding nonaccrual loans as of the dates indicated:

	Nonaccrual Balances
	March 31, 2021						December 31, 2020
	With Allowance for Credit Losses		Without Allowance for Credit Losses		Total		With Allowance for Credit Losses		Without Allowance for Credit Losses		Total
	(Dollars in thousands)
Commercial and industrial	$	3,606	$	26,179	$	29,785	$	3,804	$	30,925	$	34,729
Commercial real estate	9,635		—		9,635		10,195		—		10,195
Small business	660		—		660		815		10		825
Residential real estate	8,870		4,522		13,392		10,935		4,593		15,528
Home equity	5,592		—		5,592		5,427		—		5,427
Other consumer	136		—		136		156		—		156
Total nonaccrual loans (1)	$	28,499	$	30,701	$	59,200	$	31,332	$	35,528	$	66,860

(1)Included in these amounts were $21.2 million and $22.2 million of nonaccruing TDRs at March 31, 2021 and December 31, 2020, respectively.

Financing Receivable, Troubled Debt Restructuring [Table Text Block]

The following table shows the Company’s total TDRs and other pertinent information as of the dates indicated:

		March 31, 2021		December 31, 2020
	(Dollars in thousands)
TDRs on accrual status		$	20,262	$	16,983
TDRs on nonaccrual		21,167		22,209
Total TDRs		$	41,429	$	39,192
Additional commitments to lend to a borrower who has been a party to a TDR		$	466	$	263

Schedule of Debtor Troubled Debt Restructuring, Subsequent Periods [Table Text Block]

The following table shows the troubled debt restructurings which occurred during the periods indicated and the change in the recorded investment subsequent to the modifications occurring:

	Three Months Ended
	March 31, 2021
	Number of Contracts	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(Dollars in thousands)
Troubled debt restructurings
Commercial and industrial (1)	1	$	14,148	$	14,148
Commercial real estate (1)	5	3,964		3,964
Small business	1	100		100
Total	7	$	18,212	$	18,212

	Three Months Ended
	March 31, 2020
	Number of Contracts	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment
	(Dollars in thousands)
Troubled debt restructurings
Commercial and industrial (1)	2	$	268	$	268
Commercial real estate (1)	1	604		604
Small business	1	49		25
Residential real estate	1	177		209
Total	5	$	1,098	$	1,106

(1)The pre-modification and post-modification balances represent the legal principal balance of the loan. During the first quarter of 2021 and 2020 there were two relationships amounting to $14.3 million and $872,000 that related to additional modifications on previously existing TDRs.

Troubled Debt Restructurings On Financing Receivables Post Modifications Table Text Block

The following table shows the Company’s post-modification balance of TDRs listed by type of modification for the periods indicated:

	Three Months Ended
	March 31
	2021		2020
	(Dollars in thousands)
Adjusted interest rate	$	—	$	604
Combination rate and maturity	14,148		—
Court ordered concession	—		25
Extended maturity	4,064		477
Total	$	18,212	$	1,106