Loans

The Company manages its loan portfolio to avoid concentration by industry, relationship size and source of repayment to lessen its credit risk exposure. For additional information on the Company's lending products, see the heading "Lending Products" under Item 1, "Business," contained in the Company's 2019 Annual Report on Form 10-K.

Loan Portfolio Classifications

Major classifications of loans at the dates indicated were as follows:



(Dollars in thousands)	March 31, 2020			December 31, 2019
Commercial real estate	$	1,442,150		$	1,394,179
Commercial and industrial	537,790			501,227
Commercial construction	345,683			317,477
Total commercial loans	2,325,623			2,212,883

Residential mortgages	254,188			247,373
Home equity	97,223			98,252
Consumer	10,194			10,054
Total retail loans	361,605			355,679

Gross loans	2,687,228			2,568,562
Deferred loan origination fees, net	(3,301		)	(3,103		)
Total loans	2,683,927			2,565,459
Allowance for loan losses	(39,764		)	(33,614		)
Net loans	$	2,644,163		$	2,531,845

Commercial loans originated by other banks in which the Company is a participating institution are carried at the pro-rata share of ownership and amounted to $101.0 million at March 31, 2020 and $104.3 million at December 31, 2019. See also "Loans serviced for others" below for information related to commercial loans participated out to various other institutions.

Loans serviced for others

At March 31, 2020 and December 31, 2019, the Company was servicing residential mortgage loans owned by investors amounting to $15.0 million and $15.7 million, respectively. Additionally, the Company was servicing commercial loans originated by the Company and participated out to various other institutions amounting to $82.2 million and $80.2 million at March 31, 2020 and December 31, 2019, respectively.

Loans serving as collateral

Loans designated as qualified collateral and pledged to the FHLB for borrowing capacity as of the dates indicated are summarized below:



(Dollars in thousands)	March 31, 2020		December 31, 2019
Commercial real estate	$	227,585	$	246,865
Residential mortgages	240,305		231,028
Home equity	7,639		7,676
Total loans pledged to FHLB	$	475,529	$	485,569

See also Note 4, "Allowance for Loan Losses," to the Company's unaudited consolidated interim financial statements of this Form 10-Q, contained below, for information on the Company's credit risk management, non-accrual, impaired and troubled debt restructured loans and the allowance for loan losses. See Note 8, "Derivatives and Hedging Activities," to the Company's unaudited consolidated interim financial statements of this Form 10-Q, contained below, for information regarding interest-rate swap agreements related to certain commercial loans, and see Note 14, "Fair Value Measurements," to the Company's unaudited consolidated interim financial statements of this Form 10-Q, contained below, for further information regarding the Company's fair value measurements for loans.