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

9 Months Ended

Sep. 30, 2015

Loans, Allowance for Loan Losses and Credit Quality [Abstract]

Tabular disclosure of financing receivables bifurcated by type of impairment evaluation [Table Text Block]

The following tables bifurcate the amount of loans and the allowance allocated to each loan category based on the type of impairment analysis as of the periods indicated:

	September 30, 2015
	(Dollars in thousands)
	Commercial and Industrial		Commercial Real Estate		Commercial Construction		Small Business		Residential Real Estate		Home Equity		Other Consumer		Total
Financing receivables ending balance:
Collectively evaluated for impairment	$	856,916	$	2,618,612	$	307,908	$	91,307	$	627,031	$	901,863	$	15,330	$	5,418,967
Individually evaluated for impairment	$	5,596	$	29,506	$	306	$	971	$	15,247	$	5,777	$	611	$	58,014
Purchased credit impaired loans	$	—	$	11,224	$	—	$	—	$	9,659	$	254	$	3	$	21,140
Total loans by group	$	862,512	$	2,659,342	$	308,214	$	92,278	$	651,937	$	907,894	$	15,944	$	5,498,121	(1	)

	December 31, 2014
	(Dollars in thousands)
	Commercial and Industrial		Commercial Real Estate		Commercial Construction		Small Business		Residential Real Estate		Home Equity		Other Consumer		Total
Financing receivables ending balance:
Collectively evaluated for impairment	$	856,185	$	2,304,099	$	265,501	$	84,159	$	505,799	$	858,305	$	16,335	$	4,890,383
Individually evaluated for impairment	$	4,654	$	30,729	$	311	$	1,088	$	15,055	$	5,330	$	868	$	58,035
Purchased credit impaired loans	$	—	$	12,495	$	182	$	—	$	9,405	$	228	$	5	$	22,315
Total loans by group	$	860,839	$	2,347,323	$	265,994	$	85,247	$	530,259	$	863,863	$	17,208	$	4,970,733	(1	)

(1) The amount of net deferred costs included in the ending balance was $4.0 million and $2.8 million at September 30, 2015 and December 31, 2014, respectively.

Summary of changes in allowance for loan losses

The following tables summarize changes in allowance for loan losses by loan category for the periods indicated:

	Three Months Ended September 30, 2015
	(Dollars in thousands)
	Commercial and Industrial			Commercial Real Estate			Commercial Construction		Small Business			Residential Real Estate			Home Equity			Other Consumer			Total
Allowance for loan losses
Beginning balance	$	15,279		$	26,359		$	4,071	$	1,248		$	2,551		$	4,871		$	616		$	54,995
Charge-offs	(497		)	(28		)	—		(2		)	(40		)	(249		)	(349		)	(1,165		)
Recoveries	22			152			—		57			6			130			208			575
Provision (benefit)	(518		)	582			422		(20		)	75			128			131			800
Ending balance	$	14,286		$	27,065		$	4,493	$	1,283		$	2,592		$	4,880		$	606		$	55,205

	Three Months Ended September 30, 2014
	(Dollars in thousands)
	Commercial and Industrial			Commercial Real Estate			Commercial Construction		Small Business			Residential Real Estate			Home Equity			Other Consumer			Total
Allowance for loan losses
Beginning balance	$	15,929		$	25,095		$	3,757	$	1,154		$	2,879		$	4,969		$	755		$	54,538
Charge-offs	(504		)	(691		)	—		(73		)	(199		)	(160		)	(279		)	(1,906		)
Recoveries	6			57			—		29			178			67			135			472
Provision (benefit)	91			1,248			356		45			(36		)	71			126			1,901
Ending balance	$	15,522		$	25,709		$	4,113	$	1,155		$	2,822		$	4,947		$	737		$	55,005

	Nine Months Ended September 30, 2015
	(Dollars in thousands)
	Commercial and Industrial			Commercial Real Estate			Commercial Construction		Small Business			Residential Real Estate			Home Equity			Other Consumer			Total
Allowance for loan losses
Beginning balance	$	15,573		$	25,873		$	3,945	$	1,171		$	2,834		$	4,956		$	748		$	55,100
Charge-offs	(1,531		)	(236		)	—		(198		)	(242		)	(659		)	(922		)	(3,788		)
Recoveries	903			1,006			—		189			52			234			509			2,893
Provision (benefit)	(659		)	422			548		121			(52		)	349			271			1,000
Ending balance	$	14,286		$	27,065		$	4,493	$	1,283		$	2,592		$	4,880		$	606		$	55,205
Ending balance: individually evaluated for impairment	$	252		$	225		$	—	$	28		$	1,313		$	245		$	27		$	2,090
Ending balance: collectively evaluated for impairment	$	14,034		$	26,840		$	4,493	$	1,255		$	1,279		$	4,635		$	579		$	53,115
	Nine Months Ended September 30, 2014
	(Dollars in thousands)
	Commercial and Industrial			Commercial Real Estate			Commercial Construction		Small Business			Residential Real Estate			Home Equity			Other Consumer			Total
Allowance for loan losses
Beginning balance	$	15,622		$	24,541		$	3,371	$	1,215		$	2,760		$	5,036		$	694		$	53,239
Charge-offs	(1,757		)	(4,273		)	—		(469		)	(653		)	(562		)	(908		)	(8,622		)
Recoveries	213			322			—		168			368			215			449			1,735
Provision (benefit)	1,444			5,119			742		241			347			258			502			8,653
Ending balance	$	15,522		$	25,709		$	4,113	$	1,155		$	2,822		$	4,947		$	737		$	55,005
Ending balance: individually evaluated for impairment	$	541		$	315		$	—	$	10		$	1,521		$	269		$	43		$	2,699
Ending balance: collectively evaluated for impairment	$	14,981		$	25,394		$	4,113	$	1,145		$	1,301		$	4,678		$	694		$	52,306

Internal risk-rating categories for the Company's commercial portfolio

The following table details the amount of outstanding principal balances relative to each of the risk-rating categories for the Company’s commercial portfolio:

		September 30, 2015
Category	Risk Rating	Commercial  and Industrial		Commercial Real Estate		Commercial Construction		Small Business		Total
		(Dollars in thousands)
Pass	1 - 6	$	796,556	$	2,504,079	$	297,405	$	88,793	$	3,686,833
Potential weakness	7	45,609		93,609		10,280		2,666		152,164
Definite weakness-loss unlikely	8	20,272		60,421		529		735		81,957
Partial loss probable	9	75		1,233		—		84		1,392
Definite loss	10	—		—		—		—		—
Total		$	862,512	$	2,659,342	$	308,214	$	92,278	$	3,922,346

		December 31, 2014
Category	Risk Rating	Commercial  and Industrial		Commercial Real Estate		Commercial Construction		Small Business		Total
		(Dollars in thousands)
Pass	1 - 6	$	801,578	$	2,196,109	$	248,696	$	81,255	$	3,327,638
Potential weakness	7	37,802		82,372		15,464		2,932		138,570
Definite weakness-loss unlikely	8	20,241		67,571		1,834		949		90,595
Partial loss probable	9	1,218		1,271		—		111		2,600
Definite loss	10	—		—		—		—		—
Total		$	860,839	$	2,347,323	$	265,994	$	85,247	$	3,559,403

Weighted average FICO scores and the weighted average combined LTV ratio

The following table shows the weighted average FICO scores and the weighted average combined LTV ratios as of the periods indicated below:

	September 30, 2015		December 31, 2014
Residential portfolio
FICO score (re-scored)(1)	741		739
LTV (re-valued)(2)	60.8	%	67.1	%
Home equity portfolio
FICO score (re-scored)(1)	765		764
LTV (re-valued)(2)	50.9	%	53.6	%

(1) The average FICO scores for September 30, 2015 are based upon rescores available from August 31, 2015 and origination score data for loans booked between September 1, 2015 and September 30, 2015. The average FICO scores for December 31, 2014 are based upon rescores available from November 30, 2014 and origination score data for loans booked between December 1, 2014 and December 31, 2014.

(2) The combined LTV ratios for September 30, 2015 are based upon updated automated valuations as of March 31, 2015 and origination value data for loans booked between April 1, 2015 and September 30, 2015. The combined LTV ratios for December 31, 2014 are based upon updated automated valuations as of February 28, 2013 and actual score data for loans booked from March 1, 2013 through December 31, 2014. For home equity loans and lines in a subordinate lien position, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.

Summary of nonaccrual loans

The following table shows nonaccrual loans at the dates indicated:

	September 30, 2015		December 31, 2014
	(Dollars in thousands)
Commercial and industrial	$	4,114	$	2,822
Commercial real estate	8,699		7,279
Commercial construction	307		311
Small business	159		246
Residential real estate	9,106		8,697
Home equity	7,142		8,038
Other consumer	40		—
Total nonaccrual loans(1)	$	29,567	$	27,393

(1) Included in these amounts were $5.2 million of nonaccruing TDRs at both September 30, 2015 and December 31, 2014, respectively.

Foreclosed Residential Real Estate Property [Table Text Block]

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

	September 30, 2015
	(Dollars in thousands)
Foreclosed residential real estate property held by the creditor	$	1,700
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure	$	1,465

Age analysis of past due financing receivables

The following table shows the age analysis of past due financing receivables as of the dates indicated:

	September 30, 2015
	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	6	$	383	3	$	920	10	$	3,334	19	$	4,637	$	857,875	$	862,512	$	—
Commercial real estate	6	1,222		4	746		16	4,769		26	6,737		2,652,605		2,659,342		—
Commercial construction	—	—		—	—		1	306		1	306		307,908		308,214		—
Small business	8	27		4	44		10	105		22	176		92,102		92,278		—
Residential real estate	12	1,620		9	1,760		23	4,096		44	7,476		644,461		651,937		—
Home equity	27	1,770		13	769		14	1,295		54	3,834		904,060		907,894		—
Other consumer (1)	308	262		9	16		13	33		330	311		15,633		15,944		—
Total	367	$	5,284	42	$	4,255	87	$	13,938	496	$	23,477	$	5,474,644	$	5,498,121	$	—

	December 31, 2014
	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	18	$	3,192	10	$	1,007	19	$	2,320	47	$	6,519	$	854,320	$	860,839	$	—
Commercial real estate	19	13,428		6	1,480		16	4,225		41	19,133		2,328,190		2,347,323		—
Commercial construction	1	506		—	—		1	311		2	817		265,177		265,994		—
Small business	7	21		8	113		7	173		22	307		84,940		85,247		—
Residential real estate	13	1,670		10	1,798		36	4,826		59	8,294		521,965		530,259		106
Home equity	20	1,559		7	307		23	2,402		50	4,268		859,595		863,863		—
Other consumer (1)	318	382		16	23		15	15		349	420		16,788		17,208		13
Total	396	$	20,758	57	$	4,728	117	$	14,272	570	$	39,758	$	4,930,975	$	4,970,733	$	119

Summary of Troubled Debt Restructuring and other pertinent information

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

	September 30, 2015		December 31, 2014
	(Dollars in thousands)
TDRs on accrual status	$	37,477	$	38,382
TDRs on nonaccrual	5,201		5,248
Total TDRs	$	42,678	$	43,630
Amount of specific reserves included in the allowance for loan losses associated with TDRs	$	1,681	$	2,004
Additional commitments to lend to a borrower who has been a party to a TDR	$	1,366	$	1,400

Change in investment recorded subsequent to modifications

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

	Three Months Ended					Nine Months Ended
	September 30, 2015					September 30, 2015
	Number of Contracts	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment (1)		Number of Contracts	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment (1)
	(Dollars in thousands)
Troubled debt restructurings
Commercial and industrial	1	$	100	$	100	10	$	1,153	$	1,153
Commercial real estate	1	653		653		6	2,963		2,963
Small business	2	103		103		7	269		269
Residential real estate	2	218		245		5	376		403
Home equity	1	36		36		4	251		251
Total	7	$	1,110	$	1,137	32	$	5,012	$	5,039

	Three Months Ended					Nine Months Ended
	September 30, 2014					September 30, 2014
	Number of Contracts	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment (1)		Number of Contracts	Pre-Modification Outstanding Recorded Investment		Post-Modification Outstanding Recorded Investment (1)
	(Dollars in thousands)
Troubled debt restructurings
Commercial and industrial	3	$	193	$	193	12	$	744	$	744
Commercial real estate	5	2,095		2,095		13	4,225		4,225
Small business	—	—		—		1	58		58
Residential real estate	1	156		158		8	1,388		1,419
Home equity	2	55		55		9	781		781
Other consumer	—	—		—		1	8		8
Total	11	$	2,499	$	2,501	44	$	7,204	$	7,235

(1) The post-modification balances represent the legal principal balance of the loan on the date of modification. These amounts may show an increase when modifications include a capitalization of interest.

Post modification balance of Troubled Debt Restructuring

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

	Three Months Ended September 30				Nine Months Ended September 30
	2015		2014		2015		2014
	(Dollars in thousands)				(Dollars in thousands)
Extended maturity	$	855	$	1,902	$	2,204	$	3,403
Adjusted interest rate	—		—		—		726
Combination rate and maturity	246		599		2,769		2,269
Court ordered concession	36		—		66		837
Total	$	1,137	$	2,501	$	5,039	$	7,235

Troubled Debt Restructurings that subsequently defaulted

The following table shows loans that have been modified during the past twelve months which have subsequently defaulted during the periods indicated:

	Three Months Ended September 30
	2015			2014
	Number of Contracts	Recorded Investment		Number of Contracts	Recorded Investment
	(Dollars in thousands)
Troubled debt restructurings that subsequently defaulted
Commercial and industrial	—	—		1	46
Residential real estate	—	—		1	87
	—	$	—	2	$	133
	Nine Months Ended September 30
	2015			2014
	Number of Contracts	Recorded Investment		Number of Contracts	Recorded Investment
	(Dollars in thousands)
Troubled debt restructurings that subsequently defaulted
Commercial real estate	2	$	880	—	$	—
Commercial and industrial	3	339		1	46
Residential real estate	—	—		3	214
	5	$	1,219	4	$	260

Impaired loans by loan portfolio

The tables below set forth information regarding the Company’s impaired loans by loan portfolio at the dates indicated:

	September 30, 2015
	Recorded Investment		Unpaid Principal Balance		Related Allowance
	(Dollars in thousands)
With no related allowance recorded
Commercial and industrial	$	2,041	$	2,193	$	—
Commercial real estate	13,740		14,835		—
Commercial construction	306		308		—
Small business	458		494		—
Residential real estate	3,555		3,658		—
Home equity	4,564		4,631		—
Other consumer	195		196		—
Subtotal	24,859		26,315		—
With an allowance recorded
Commercial and industrial	$	3,555	$	3,641	$	252
Commercial real estate	15,766		15,938		225
Small business	513		543		28
Residential real estate	11,692		12,806		1,313
Home equity	1,213		1,359		245
Other consumer	416		430		27
Subtotal	33,155		34,717		2,090
Total	$	58,014	$	61,032	$	2,090

	December 31, 2014
	Recorded Investment		Unpaid Principal Balance		Related Allowance
	(Dollars in thousands)
With no related allowance recorded
Commercial and industrial	$	3,005	$	3,278	$	—
Commercial real estate	15,982		17,164		—
Commercial construction	311		311		—
Small business	692		718		—
Residential real estate	2,439		2,502		—
Home equity	4,169		4,221		—
Other consumer	338		341		—
Subtotal	26,936		28,535		—
With an allowance recorded
Commercial and industrial	$	1,649	$	1,859	$	412
Commercial real estate	14,747		15,514		197
Small business	396		458		7
Residential real estate	12,616		13,727		1,500
Home equity	1,161		1,264		262
Other consumer	530		530		38
Subtotal	31,099		33,352		2,416
Total	$	58,035	$	61,887	$	2,416

Interest income recognized on impaired loans

The following tables set forth information regarding interest income recognized on impaired loans, by portfolio, for the periods indicated:

	Three Months Ended				Nine Months Ended
	September 30, 2015				September 30, 2015
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
With no related allowance recorded
Commercial and industrial	$	2,080	$	11	$	2,204	$	41
Commercial real estate	13,876		89		14,433		337
Commercial construction	307		—		309		—
Small business	465		4		484		14
Residential real estate	3,566		42		3,601		123
Home equity	4,585		44		4,670		134
Other consumer	198		4		207		12
Subtotal	25,077		194		25,908		661
With an allowance recorded
Commercial and industrial	$	3,687	$	10	$	3,894	$	57
Commercial real estate	15,830		204		15,993		609
Small business	540		7		564		22
Residential real estate	11,698		106		11,764		358
Home equity	1,221		4		1,238		13
Other consumer	421		4		443		11
Subtotal	33,397		335		33,896		1,070
Total	$	58,474	$	529	$	59,804	$	1,731

	Three Months Ended				Nine Months Ended
	September 30, 2014				September 30, 2014
	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
	(Dollars in thousands)
With no related allowance recorded
Commercial and industrial	$	4,411	$	47	$	4,743	$	155
Commercial real estate	16,517		154		17,098		492
Small business	840		8		889		25
Residential real estate	2,806		34		2,836		71
Home equity	4,405		45		4,456		136
Other consumer	365		5		382		19
Subtotal	29,655		293		30,715		904
With an allowance recorded
Commercial and industrial	$	3,889	$	24	$	4,285	$	98
Commercial real estate	17,509		233		17,674		700
Small business	427		7		452		22
Residential real estate	12,841		106		12,959		324
Home equity	1,111		4		1,124		15
Other consumer	625		5		656		17
Subtotal	36,402		379		37,150		1,176
Total	$	66,057	$	672	$	67,865	$	2,080

Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period

The following table displays certain information pertaining to PCI loans at the dates indicated:

	September 30, 2015		December 31, 2014
	(Dollars in thousands)
Outstanding balance	$	23,877	$	25,279
Carrying amount	$	21,140	$	22,315

Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule

The following table summarizes activity in the accretable yield for the PCI loan portfolio:

	Three Months Ended September 30						Nine Months Ended September 30
	2015			2014			2015			2014
	(Dollars in thousands)
Beginning balance	$	2,527		$	3,845		$	2,974		$	2,514
Acquisition	—			—			319			—
Accretion	(592		)	(667		)	(2,138		)	(1,722		)
Other change in expected cash flows (1)	278			380			978			2,572
Reclassification from nonaccretable difference for loans which have paid off (2)	218			—			298			194
Ending balance	$	2,431		$	3,558		$	2,431		$	3,558

(1) Represents changes in cash flows expected to be collected and resulting in increased interest income as a prospective yield adjustment over the remaining life of the loan(s).

(2) Results in increased interest income during the period in which the loan paid off at amount greater than originally expected.