Allowance for Loan Losses (Tables)

12 Months Ended

Dec. 31, 2017

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:



	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



	December 31, 2016
(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	$	2,479,513	$	2,032	$	759	$	16,172	$	18,963	$	2,498,476
Commercial and industrial	1,391,475		1,061		428		8,071		9,560		1,401,035
Commercial construction	450,410		547		—		4,927		5,474		455,884
Residential mortgage	689,635		1,312		1,117		9,918		12,347		701,982
Home equity	476,866		1,470		509		3,439		5,418		482,284
Installment and other consumer	65,525		176		43		108		327		65,852
Consumer construction	5,906		—		—		—		—		5,906
Loans held for sale	3,793		—		—		—		—		3,793
Total	$	5,563,123	$	6,598	$	2,856	$	42,635	$	52,089	$	5,615,212

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:



	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	%



	December 31, 2016
(dollars in thousands)	Commercial Real Estate		% of Total		Commercial and Industrial		% of Total		Commercial Construction		% of Total		Total		% of Total
Pass	$	2,423,742	97.0	%	$	1,315,507	93.9	%	$	430,472	94.4	%	$	4,169,721	95.7	%
Special mention	33,098		1.3	%	40,409		2.9	%	14,691		3.2	%	88,198		2.0	%
Substandard	41,636		1.7	%	45,119		3.2	%	10,721		2.4	%	97,476		2.3	%
Total	$	2,498,476	100.0	%	$	1,401,035	100.0	%	$	455,884	100.0	%	$	4,355,395	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:



	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	%



	December 31, 2016
(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	$	692,064	98.6	%	$	478,845	99.3	%	$	65,744	99.8	%	$	5,906	100.0	%	$	1,242,559	98.9	%
Nonperforming	9,918		1.4	%	3,439		0.7	%	108		0.2	%	—		—	%	13,465		1.1	%
Total	$	701,982	100.0	%	$	482,284	100.0	%	$	65,852	100.0	%	$	5,906	100.0	%	$	1,256,024	100.0	%

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

The following table summarizes investments in loans considered to be impaired and related information on those impaired loans for the years presented:



	For the Year Ended
	December 31, 2017				December 31, 2016
(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	968		52		2,438		—
Commercial construction	—		—		—		—
Consumer real estate	23		2		28		2
Other consumer	34		2		2		—
Total with a Related Allowance Recorded	1,025		56		2,468		2
Without a related allowance recorded:
Commercial real estate	6,636		177		17,496		144
Commercial and industrial	9,897		257		6,141		160
Commercial construction	6,828		253		7,723		162
Consumer real estate	11,037		487		11,939		523
Other consumer	23		—		35		1
Total without a Related Allowance Recorded	34,421		1,174		43,334		990
Total:
Commercial real estate	6,636		177		17,496		144
Commercial and industrial	10,865		309		8,579		160
Commercial construction	6,828		253		7,723		162
Consumer real estate	11,060		489		11,967		525
Other consumer	57		2		37		1
Total	$	35,446	$	1,230	$	45,802	$	992

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



	December 31, 2017						December 31, 2016
(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	1,735		1,787		29		964		2,433		771
Commercial construction	—		—		—		—		—		—
Consumer real estate	21		21		21		26		26		26
Other consumer	27		27		27		1		1		1
Total with a Related Allowance Recorded	1,783		1,835		77		991		2,460		798
Without a related allowance recorded:
Commercial real estate	3,546		3,811		—		16,352		17,654		—
Commercial and industrial	5,549		7,980		—		5,902		7,699		—
Commercial construction	5,464		8,132		—		6,613		10,306		—
Consumer real estate	10,467		11,357		—		12,053		12,849		—
Other consumer	14		22		—		24		31		—
Total without a Related Allowance Recorded	25,040		31,302		—		40,944		48,539		—
Total:
Commercial real estate	3,546		3,811		—		16,352		17,654		—
Commercial and industrial	7,284		9,767		29		6,866		10,132		771
Commercial construction	5,464		8,132		—		6,613		10,306		—
Consumer real estate	10,488		11,378		21		12,079		12,875		26
Other consumer	41		49		27		25		32		1
Total	$	26,823	$	33,137	$	77	$	41,935	$	50,999	$	798

Summary of Allowance for Loan Losses

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



	2017
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	19,976		$	10,810		$	13,999		$	6,095		$	1,895		$	52,775
Charge-offs	(2,304		)	(4,709		)	(2,571		)	(2,274		)	(1,638		)	(13,496		)
Recoveries	810			654			851			342			571			3,228
Net (Charge-offs) Recoveries	(1,494		)	(4,055		)	(1,720		)	(1,932		)	(1,067		)	(10,268		)
Provision for loan losses	8,753			2,211			888			1,316			715			13,883
Balance at End of Year	$	27,235		$	8,966		$	13,167		$	5,479		$	1,543		$	56,390



	2016
(dollars in thousands)	Commercial Real Estate			Commercial and Industrial			Commercial Construction			Consumer Real Estate			Other Consumer			Total Loans
Balance at beginning of year	$	15,043		$	10,853		$	12,625		$	8,400		$	1,226		$	48,147
Charge-offs	(3,114		)	(6,810		)	(1,877		)	(1,657		)	(2,103		)	(15,561		)
Recoveries	692			722			21			433			356			2,224
Net Recoveries (Charge-offs)	(2,422		)	(6,088		)	(1,856		)	(1,224		)	(1,747		)	(13,337		)
Provision for loan losses	7,355			6,045			3,230			(1,081		)	2,416			17,965
Balance at End of Year	$	19,976		$	10,810		$	13,999		$	6,095		$	1,895		$	52,775

Summary of Allowance for Loan Losses and Recorded Investments

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



	2016
	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	$	—	$	19,976	$	19,976	$	16,352	$	2,482,124	$	2,498,476
Commercial and industrial	771		10,039		10,810		6,866		1,394,169		1,401,035
Commercial construction	—		13,999		13,999		6,613		449,271		455,884
Consumer real estate	26		6,069		6,095		12,079		1,178,093		1,190,172
Other consumer	1		1,894		1,895		25		65,827		65,852
Total	$	798	$	51,977	$	52,775	$	41,935	$	5,569,484	$	5,611,419