Allowance for Loan Losses (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Age Analysis of Past Due Loans Segregated by Class of Loans

The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:

	March 31, 2018
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,755,336	$	1,162	$	441	$	3,952	$	5,555	$	2,760,891
Commercial and industrial	1,401,154		1,059		120		4,617		5,796		1,406,950
Commercial construction	321,900		368		—		1,873		2,241		324,141
Residential mortgage	682,092		3,125		453		6,715		10,293		692,385
Home equity	468,762		1,603		376		4,109		6,088		474,850
Installment and other consumer	66,551		189		81		69		339		66,890
Consumer construction	4,506		—		—		—		—		4,506
Loans held for sale	3,283		—		—		—		—		3,283
Total	$	5,703,584	$	7,506	$	1,471	$	21,335	$	30,312	$	5,733,896

	December 31, 2017
(dollars in thousands)	Current		30-59 Days Past Due		60-89 Days Past Due		Non - performing		Total Past Due Loans		Total Loans
Commercial real estate	$	2,681,395	$	997	$	134	$	3,468	$	4,599	$	2,685,994
Commercial and industrial	1,426,754		420		446		5,646		6,512		1,433,266
Commercial construction	377,968		2,473		20		3,873		6,366		384,334
Residential mortgage	687,195		2,975		1,439		7,165		11,579		698,774
Home equity	480,956		2,065		590		3,715		6,370		487,326
Installment and other consumer	66,770		193		170		71		434		67,204
Consumer construction	4,551		—		—		—		—		4,551
Loans held for sale	4,485		—		—		—		—		4,485
Total	$	5,730,074	$	9,123	$	2,799	$	23,938	$	35,860	$	5,765,934

Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings

The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:

	March 31, 2018
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,625,232	95.1	%	$	1,294,478	92.0	%	$	303,985	93.8	%	$	4,223,695	94.0	%
Special mention	68,204		2.5	%	65,557		4.7	%	14,919		4.6	%	148,680		3.3	%
Substandard	67,455		2.4	%	46,915		3.3	%	5,237		1.6	%	119,607		2.7	%
Total	$	2,760,891	100.0	%	$	1,406,950	100.0	%	$	324,141	100.0	%	$	4,491,982	100.0	%
	December 31, 2017
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,588,847	96.4	%	$	1,345,810	93.9	%	$	368,105	95.8	%	$	4,302,762	95.5	%
Special mention	66,436		2.5	%	54,320		3.8	%	9,345		2.4	%	130,101		2.9	%
Substandard	30,711		1.1	%	33,136		2.3	%	6,884		1.8	%	70,731		1.6	%
Total	$	2,685,994	100.0	%	$	1,433,266	100.0	%	$	384,334	100.0	%	$	4,503,594	100.0	%

Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status

The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:

	March 31, 2018
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	685,670	99.0	%	$	470,741	99.1	%	$	66,821	99.9	%	$	4,506	100.0	%	$	1,227,738	99.1	%
Nonperforming	6,715		1.0	%	4,109		0.9	%	69		0.1	%	—		—	%	10,893		0.9	%
Total	$	692,385	100.0	%	$	474,850	100.0	%	$	66,890	100.0	%	$	4,506	100.0	%	$	1,238,631	100.0	%
	December 31, 2017
(dollars in thousands)	Residential Mortgage		% of Total		Home Equity		% of Total		Installment and other consumer		% of Total		Consumer Construction		% of Total		Total		% of Total
Performing	$	691,609	99.0	%	$	483,611	99.2	%	$	67,133	99.9	%	$	4,551	100.0	%	$	1,246,904	99.1	%
Nonperforming	7,165		1.0	%	3,715		0.8	%	71		0.1	%	—		—	%	10,951		0.9	%
Total	$	698,774	100.0	%	$	487,326	100.0	%	$	67,204	100.0	%	$	4,551	100.0	%	$	1,257,855	100.0	%

Investments in Loans Considered to be Impaired and Related Information on Impaired Loans

The following tables summarize investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:

	March 31, 2018						December 31, 2017
(dollars in thousands)	Recorded Investment		Unpaid Principal Balance		Related Allowance		Recorded Investment		Unpaid Principal Balance		Related Allowance
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—	$	—	$	—
Commercial and industrial	656		671		537		1,735		1,787		29
Commercial construction	—		—		—		—		—		—
Consumer real estate	—		—		—		21		21		21
Other consumer	39		39		39		27		27		27
Total with a Related Allowance Recorded	695		710		576		1,783		1,835		77
Without a related allowance recorded:
Commercial real estate	3,774		4,034		—		3,546		3,811		—
Commercial and industrial	11,917		13,972		—		5,549		7,980		—
Commercial construction	3,444		4,954		—		5,464		8,132		—
Consumer real estate	10,052		10,987		—		10,467		11,357		—
Other consumer	10		17		—		14		22		—
Total without a Related Allowance Recorded	29,197		33,964		—		25,040		31,302		—
Total:
Commercial real estate	3,774		4,034		—		3,546		3,811		—
Commercial and industrial	12,573		14,643		537		7,284		9,767		29
Commercial construction	3,444		4,954		—		5,464		8,132		—
Consumer real estate	10,052		10,987		—		10,488		11,378		21
Other consumer	49		56		39		41		49		27
Total	$	29,892	$	34,674	$	576	$	26,823	$	33,137	$	77

The following table summarizes average recorded investment in and interest income recognized on loans considered to be impaired for the periods presented:

	Three Months Ended
	March 31, 2018				March 31, 2017
(dollars in thousands)	Average Recorded Investment		Interest Income Recognized		Average Recorded Investment		Interest Income Recognized
With a related allowance recorded:
Commercial real estate	$	—	$	—	$	—	$	—
Commercial and industrial	586		11		10,008		72
Commercial construction	—		—		—		—
Consumer real estate	—		—		26		—
Other consumer	42		1		1		—
Total with a Related Allowance Recorded	628		12		10,035		72
Without a related allowance recorded:
Commercial real estate	3,817		43		8,581		33
Commercial and industrial	6,688		110		11,410		43
Commercial construction	3,446		36		6,239		37
Consumer real estate	10,816		138		11,692		129
Other consumer	12		—		22		—
Total without a Related Allowance Recorded	24,779		327		37,944		242
Total:
Commercial real estate	3,817		43		8,581		33
Commercial and industrial	7,274		121		21,418		115
Commercial construction	3,446		36		6,239		37
Consumer real estate	10,816		138		11,718		129
Other consumer	54		1		23		—
Total	$	25,407	$	339	$	47,979	$	314

Summary of Allowance for Loan Losses

The following tables detail activity in the ALL for the periods presented:

	Three Months Ended March 31, 2018
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	27,235		$	8,966		$	13,167		$	5,479		$	1,543		$	56,390
Charge-offs	—			(829		)	—			(161		)	(460		)	(1,450		)
Recoveries	49			117			1,129			238			101			1,634
Net (Charge-offs)/ Recoveries	49			(712		)	1,129			77			(359		)	184
Provision for loan losses	3,679			2,218			(3,575		)	(138		)	288			2,472
Balance at End of Period	$	30,963		$	10,472		$	10,721		$	5,418		$	1,472		$	59,046
	Three Months Ended March 31, 2017
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of period	$	19,976		$	10,810		$	13,999		$	6,095		$	1,895		$	52,775
Charge-offs	(390		)	(715		)	(644		)	(759		)	(434		)	(2,942		)
Recoveries	78			187			256			103			176			800
Net (Charge-offs)/ Recoveries	(312		)	(528		)	(388		)	(656		)	(258		)	(2,142		)
Provision for loan losses	906			2,962			491			517			307			5,183
Balance at End of Period	$	20,570		$	13,244		$	14,102		$	5,956		$	1,944		$	55,816

Summary of Allowance for Loan Losses and Recorded Investments

The following tables present the ALL and recorded investments in loans by category as of the periods presented:

	March 31, 2018
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	30,963	$	30,963	$	3,774	$	2,757,117	$	2,760,891
Commercial and industrial	537		9,935		10,472		12,573		1,394,377		1,406,950
Commercial construction	—		10,721		10,721		3,444		320,697		324,141
Consumer real estate	—		5,418		5,418		10,052		1,161,689		1,171,741
Other consumer	39		1,433		1,472		49		66,841		66,890
Total	$	576	$	58,470	$	59,046	$	29,892	$	5,700,721	$	5,730,613
	December 31, 2017
	Allowance for Loan Losses						Portfolio Loans
(dollars in thousands)	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial real estate	$	—	$	27,235	$	27,235	$	3,546	$	2,682,448	$	2,685,994
Commercial and industrial	29		8,937		8,966		7,284		1,425,982		1,433,266
Commercial construction	—		13,167		13,167		5,464		378,870		384,334
Consumer real estate	21		5,458		5,479		10,488		1,180,163		1,190,651
Other consumer	27		1,516		1,543		41		67,163		67,204
Total	$	77	$	56,313	$	56,390	$	26,823	$	5,734,626	$	5,761,449