Loan Portfolio and Credit Quality (Tables)

9 Months Ended

Sep. 30, 2017

Loans and Leases Receivable Disclosure [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

The following table presents a summary of the loan portfolio by portfolio segment and class of receivable as of the dates indicated:

	September 30, 2017		December 31, 2016
	(In thousands)
Commercial and industrial	$	618,256	$	611,370
Commercial tax exempt	431,350		398,604
Total commercial and industrial	1,049,606		1,009,974
Commercial real estate	2,363,159		2,302,244
Construction and land	118,291		104,839
Residential	2,600,788		2,379,861
Home equity	107,227		118,817
Consumer and other	174,130		198,619
Total	$	6,413,201	$	6,114,354

Schedule of Financing Receivables, Non Accrual Status [Table Text Block]

The following table presents nonaccrual loans receivable by portfolio segment and class of receivable as of the dates indicated:

	September 30, 2017		December 31, 2016
	(In thousands)
Commercial and industrial	$	968	$	572
Commercial tax exempt	—		—
Total commercial and industrial	968		572
Commercial real estate	2,601		4,583
Construction and land	206		179
Residential	8,765		10,908
Home equity	1,062		1,072
Consumer and other	21		1
Total	$	13,623	$	17,315

Past Due Financing Receivables [Table Text Block]

The following tables show the payment status of loans by class of receivable as of the dates indicated:

	September 30, 2017
	Accruing Past Due						Nonaccrual Loans
	30-59 Days Past Due		60-89 Days Past Due		Total Accruing Past Due		Current		30-89 Days Past Due		90 Days or Greater Past Due		Total Non-Accrual Loans		Current Accruing Loans		Total Loans Receivable
	(In thousands)
Commercial and industrial	$	945	$	14	$	959	$	400	$	350	$	218	$	968	$	616,329	$	618,256
Commercial tax exempt	—		—		—		—		—		—		—		431,350		431,350
Commercial real estate	663		244		907		670		—		1,931		2,601		2,359,651		2,363,159
Construction and land	413		—		413		59		4		143		206		117,672		118,291
Residential	—		226		226		5,063		152		3,550		8,765		2,591,797		2,600,788
Home equity	402		1,800		2,202		72		—		990		1,062		103,963		107,227
Consumer and other	568		17		585		13		—		8		21		173,524		174,130
Total	$	2,991	$	2,301	$	5,292	$	6,277	$	506	$	6,840	$	13,623	$	6,394,286	$	6,413,201

	December 31, 2016
	Accruing Past Due						Nonaccrual Loans
	30-59 Days Past Due		60-89 Days Past Due		Total Accruing Past Due		Current		30-89 Days Past Due		90 Days or Greater Past Due		Total Non-Accrual Loans		Current Accruing Loans		Total Loans Receivable
	(In thousands)
Commercial and industrial	$	541	$	1,078	$	1,619	$	537	$	—	$	35	$	572	$	609,179	$	611,370
Commercial tax exempt	—		—		—		—		—		—		—		398,604		398,604
Commercial real estate	3,096		—		3,096		2,311		835		1,437		4,583		2,294,565		2,302,244
Construction and land	—		—		—		129		12		38		179		104,660		104,839
Residential	3,646		536		4,182		2,148		1,274		7,486		10,908		2,364,771		2,379,861
Home equity	245		—		245		—		80		992		1,072		117,500		118,817
Consumer and other	5,995		—		5,995		1		—		—		1		192,623		198,619
Total	$	13,523	$	1,614	$	15,137	$	5,126	$	2,201	$	9,988	$	17,315	$	6,081,902	$	6,114,354

Financing Receivable Credit Quality Indicators [Table Text Block]

The following tables present the loan portfolio’s credit risk profile by internally assigned grade and class of receivable as of the dates indicated:

	September 30, 2017
	By Loan Grade or Nonaccrual Status
	Pass		Special Mention		Accruing Substandard		Nonaccrual Loans		Total
	(In thousands)
Commercial and industrial	$	598,691	$	10,459	$	8,138	$	968	$	618,256
Commercial tax exempt	425,759		5,591		—		—		431,350
Commercial real estate	2,265,871		57,381		37,306		2,601		2,363,159
Construction and land	106,154		5,243		6,688		206		118,291
Residential	2,590,665		—		1,358		8,765		2,600,788
Home equity	106,165		—		—		1,062		107,227
Consumer and other	173,858		—		251		21		174,130
Total	$	6,267,163	$	78,674	$	53,741	$	13,623	$	6,413,201

	December 31, 2016
	By Loan Grade or Nonaccrual Status
	Pass		Special Mention		Accruing Substandard		Nonaccrual Loans		Total
	(In thousands)
Commercial and industrial	$	591,388	$	10,133	$	9,277	$	572	$	611,370
Commercial tax exempt	388,544		10,060		—		—		398,604
Commercial real estate	2,230,732		17,233		49,696		4,583		2,302,244
Construction and land	101,254		109		3,297		179		104,839
Residential	2,367,554		—		1,399		10,908		2,379,861
Home equity	117,745		—		—		1,072		118,817
Consumer and other	198,616		—		2		1		198,619
Total	$	5,995,833	$	37,535	$	63,671	$	17,315	$	6,114,354

Impaired Financing Receivables [Table Text Block]

The following tables present, by class of receivable, the balance of impaired loans with and without a related allowance, the associated allowance for those impaired loans with a related allowance, and the total unpaid principal on impaired loans:

	As of and for the three and nine months ended September 30, 2017
	Recorded Investment (1)		Unpaid Principal Balance		Related Allowance		QTD Average Recorded Investment		YTD Average Recorded Investment		QTD Interest Income Recognized while Impaired		YTD Interest Income Recognized while Impaired
	(In thousands)
With no related allowance recorded:
Commercial and industrial	$	1,371	$	1,988	n/a		$	1,626	$	1,665	$	18	$	43
Commercial tax exempt	—		—		n/a		—		1,301		—		80
Commercial real estate	2,463		5,972		n/a		2,690		3,465		107		1,077
Construction and land	207		241		n/a		218		191		—		—
Residential	8,859		9,231		n/a		9,069		8,938		98		277
Home equity	—		—		n/a		—		—		—		—
Consumer and other	—		—		n/a		—		—		—		—
Subtotal	12,900		17,432		n/a		13,603		15,560		223		1,477
With an allowance recorded:
Commercial and industrial	598		598		$	242	149		60		1		1
Commercial tax exempt	—		—		—		—		—		—		—
Commercial real estate	6,911		7,341		415		6,955		7,012		76		247
Construction and land	—		—		—		—		—		—		—
Residential	1,200		1,200		127		2,175		2,938		18		80
Home equity	36		36		21		36		37		—		1
Consumer and other	—		—		—		—		—		—		—
Subtotal	8,745		9,175		805		9,315		10,047		95		329
Total:
Commercial and industrial	1,969		2,586		242		1,775		1,725		19		44
Commercial tax exempt	—		—		—		—		1,301		—		80
Commercial real estate	9,374		13,313		415		9,645		10,477		183		1,324
Construction and land	207		241		—		218		191		—		—
Residential	10,059		10,431		127		11,244		11,876		116		357
Home equity	36		36		21		36		37		—		1
Consumer and other	—		—		—		—		—		—		—
Total	$	21,645	$	26,607	$	805	$	22,918	$	25,607	$	318	$	1,806

_____________________

(1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal.

	As of and for the three and nine months ended September 30, 2016
	Recorded Investment (1)		Unpaid Principal Balance		Related Allowance		QTD Average Recorded Investment		YTD Average Recorded Investment		QTD Interest Income Recognized while Impaired		YTD Interest Income Recognized while Impaired
	(In thousands)
With no related allowance recorded:
Commercial and industrial	$	11,742	$	13,874	n/a		$	10,774	$	6,325	$	98	$	169
Commercial tax exempt	—		—		n/a		—		—		—		—
Commercial real estate	5,966		11,148		n/a		7,288		9,672		332		874
Construction and land	224		548		n/a		400		1,332		48		48
Residential	6,472		6,832		n/a		7,345		7,345		59		173
Home equity	—		—		n/a		—		—		—		—
Consumer and other	—		—		n/a		—		—		—		—
Subtotal	24,404		32,402		n/a		25,807		24,674		537		1,264
With an allowance recorded:
Commercial and industrial	37		37		$	22	37		33		—		1
Commercial tax exempt	—		—		—		—		—		—		—
Commercial real estate	7,164		7,593		593		7,194		7,259		79		237
Construction and land	—		—		—		—		660		—		—
Residential	6,877		6,877		701		5,977		5,994		36		115
Home equity	—		—		—		—		—		—		—
Consumer and other	—		—		—		—		—		—		—
Subtotal	14,078		14,507		1,316		13,208		13,946		115		353
Total:
Commercial and industrial	11,779		13,911		22		10,811		6,358		98		170
Commercial tax exempt	—		—		—		—		—		—		—
Commercial real estate	13,130		18,741		593		14,482		16,931		411		1,111
Construction and land	224		548		—		400		1,992		48		48
Residential	13,349		13,709		701		13,322		13,339		95		288
Home equity	—		—		—		—		—		—		—
Consumer and other	—		—		—		—		—		—		—
Total	$	38,482	$	46,909	$	1,316	$	39,015	$	38,620	$	652	$	1,617

_____________________

(1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal.

	As of and for the year ended December 31, 2016
	Recorded Investment (1)		Unpaid Principal Balance		Related Allowance		Average Recorded Investment		Interest Income Recognized while Impaired
	(In thousands)
With no related allowance recorded:
Commercial and industrial	$	1,793	$	2,155	n/a		$	5,288	$	249
Commercial tax exempt	—		—		n/a		—		—
Commercial real estate	4,488		9,647		n/a		8,520		1,032
Construction and land	179		507		n/a		1,069		48
Residential	8,134		8,506		n/a		7,446		211
Home equity	—		—		n/a		—		—
Consumer and other	—		—		n/a		—		—
Subtotal	14,594		20,815		n/a		22,323		1,540
With an allowance recorded:
Commercial and industrial	—		—		$	—	31		1
Commercial tax exempt	—		—		—		—		—
Commercial real estate	7,115		7,544		548		7,230		314
Construction and land	—		—		—		507		—
Residential	4,284		4,284		565		5,505		143
Home equity	37		37		22		3		—
Consumer and other	—		—		—		—		—
Subtotal	11,436		11,865		1,135		13,276		458
Total:
Commercial and industrial	1,793		2,155		—		5,319		250
Commercial tax exempt	—		—		—		—		—
Commercial real estate	11,603		17,191		548		15,750		1,346
Construction and land	179		507		—		1,576		48
Residential	12,418		12,790		565		12,951		354
Home equity	37		37		22		3		—
Consumer and other	—		—		—		—		—
Total	$	26,030	$	32,680	$	1,135	$	35,599	$	1,998

_____________________

(1) Recorded investment represents the client loan balance net of historical charge-offs and historical nonaccrual interest paid, which was applied to principal.

The following tables present the Company’s allowance for loan losses and loan portfolio at September 30, 2017 and December 31, 2016 by portfolio segment, disaggregated by method of impairment analysis. The Company had no loans acquired with deteriorated credit quality at September 30, 2017 or December 31, 2016.

	September 30, 2017
	Individually Evaluated for Impairment				Collectively Evaluated for Impairment				Total
	Recorded investment (loan balance)		Allowance for loan losses		Recorded investment (loan balance)		Allowance for loan losses		Recorded investment (loan balance)		Allowance for loan losses
	(In thousands)
Commercial and industrial	$	1,969	$	242	$	1,047,637	$	12,644	$	1,049,606	$	12,886
Commercial real estate	9,374		415		2,353,785		46,624		2,363,159		47,039
Construction and land	207		—		118,084		3,780		118,291		3,780
Residential	10,059		127		2,590,729		9,724		2,600,788		9,851
Home equity	36		21		107,191		893		107,227		914
Consumer	—				174,130		403		174,130		403
Total	$	21,645	$	805	$	6,391,556	$	74,068	$	6,413,201	$	74,873

	December 31, 2016
	Individually Evaluated for Impairment				Collectively Evaluated for Impairment				Total
	Recorded investment (loan balance)		Allowance for loan losses		Recorded investment (loan balance)		Allowance for loan losses		Recorded investment (loan balance)		Allowance for loan losses
	(In thousands)
Commercial and industrial	$	1,793	$	—	$	1,008,181	$	12,751	$	1,009,974	$	12,751
Commercial real estate	11,603		548		2,290,641		49,864		2,302,244		50,412
Construction and land	179		—		104,660		3,039		104,839		3,039
Residential	12,418		565		2,367,443		9,884		2,379,861		10,449
Home equity	37		22		118,780		1,013		118,817		1,035
Consumer	—		—		198,619		391		198,619		391
Total	$	26,030	$	1,135	$	6,088,324	$	76,942	$	6,114,354	$	78,077

Troubled Debt Restructurings on Financing Receivables [Table Text Block]

The following tables present the balance of TDRs that were restructured or defaulted during the periods indicated and the types of concessions granted:

	As of and for the three and nine months ended September 30, 2017
	Restructured in the current quarter and year to date					TDRs that defaulted that were restructured in prior twelve months
	# of Loans	Pre- modification recorded investment		Post- modification recorded investment		# of Loans	Post- modification recorded investment
	(Dollars in thousands)
Commercial and industrial	—	$	—	$	—	—	$	—
Commercial tax exempt	—	—		—		—	—
Commercial real estate	—	—		—		—	—
Construction and land	—	—		—		—	—
Residential (1)	1	108		109		—	—
Home equity	—	—		—		—	—
Consumer and other	—	—		—		—	—
Total	1	$	108	$	109	—	$	—

_____________________

(1) Represents the following concession: temporary rate reduction.

	As of and for the three months ended September 30, 2016
	Restructured in the current quarter					TDRs that defaulted that were restructured in prior twelve months
	# of Loans	Pre- modification recorded investment		Post- modification recorded investment		# of Loans	Post- modification recorded investment
	(Dollars in thousands)
Commercial and industrial	—	$	—	$	—	—	$	—
Commercial tax exempt	—	—		—		—	—
Commercial real estate	—	—		—		1	1,276
Construction and land	—	—		—		—	—
Residential	—	—		—		—	—
Home equity	—	—		—		—	—
Consumer and other	—	—		—		—	—
Total	—	$	—	$	—	1	$	1,276

	As of and for the nine months ended September 30, 2016
	Restructured in the current year to date					TDRs that defaulted that were restructured in prior twelve months
	# of Loans	Pre- modification recorded investment		Post- modification recorded investment		# of Loans	Post- modification recorded investment
	(Dollars in thousands)
Commercial and industrial	3	$	7,384	$	7,209	—	$	—
Commercial tax exempt	—	—		—		—	—
Commercial real estate	1	1,276		1,276		1	1,276
Construction and land	—	—		—		—	—
Residential	2	260		261		—	—
Home equity	—	—		—		—	—
Consumer and other	—	—		—		—	—
Total	6	$	8,920	$	8,746	1	$	1,276

	As of and for the nine months ended September 30, 2016
	Extension of term			Temporary rate reduction			Payment deferral			Combination of concessions (1)			Total concessions
	# of Loans	Post- modifi- cation recorded invest- ment		# of Loans	Post- modifi- cation recorded invest- ment		# of Loans	Post- modifi- cation recorded invest- ment		# of Loans	Post- modifi- cation recorded invest- ment		# of Loans	Post- modifi- cation recorded invest- ment
	(Dollars in thousands)
Commercial and industrial	2	$	7,209	—	$	—	—	$	—	1	$	—	3	$	7,209
Commercial tax exempt	—	—		—	—		—	—		—	—		—	—
Commercial real estate	—	—		—	—		—	—		1	1,276		1	1,276
Construction and land	—	—		—	—		—	—		—	—		—	—
Residential	—	—		2	261		—	—		—	—		2	261
Home equity	—	—		—	—		—	—		—	—		—	—
Consumer and other	—	—		—	—		—	—		—	—		—	—

_____________________

(1) Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral.