Commercial and industrial (C&I). C&I loans primarily include commercial and industrial lending used for general corporate purposes, working capital and liquidity, and “event-driven." “Event-driven” loans support client merger, acquisition or recapitalization activities. C&I lending is structured as revolving lines of credit, letter of credit facilities, term loans and bridge loans. Risk factors considered in determining the allowance for corporate loans include the borrower’s financial strength, seniority of the loan, collateral type, leverage, volatility of collateral value, debt cushion, and covenants.

Real Estate. Real estate loans include residential real estate non-conforming loans, residential real estate conforming loans, commercial real estate, and home equity lines of credit. The allowance methodology related to real estate loans considers several

factors, including, but not limited to, loan-to-value ratio, FICO score, home price index, delinquency status, credit limits, and utilization rates.

Securities-based loans. Securities-based loans allow clients to borrow money against the value of qualifying securities for any suitable purpose other than purchasing, trading, or carrying securities or refinancing margin debt. The majority of consumer loans are structured as revolving lines of credit and letter of credit facilities and are primarily offered through Stifel’s Pledged Asset ("SPA") program. The allowance methodology for securities-based lending considers the collateral type underlying the loan, including the liquidity and trading volume of the collateral, position concentration and other borrower specific factors such as personal guarantees.

Construction and land. Short-term loans used to finance the development of a real estate project.

The following table presents the balance and associated percentage of each major loan category in our bank loan portfolio at June 30, 2019 and December 31, 2018 (in thousands, except percentages):

	June 30, 2019						December 31, 2018
	Balance			Percent			Balance			Percent
Commercial and industrial	$	3,338,127			36.8	%	$	3,304,234			38.5	%
Residential real estate		2,984,725			32.9			2,875,014			33.5
Securities-based loans		1,962,528			21.6			1,786,966			20.8
Commercial real estate		367,283			4.1			318,961			3.7
Construction and land		226,559			2.5			138,245			1.6
Home equity lines of credit		49,209			0.5			38,098			0.4
Other		137,847			1.6			120,129			1.5
Gross bank loans		9,066,278			100.0	%		8,581,647			100.0	%
Unamortized loan discount, net		(11,265	)					(12,155	)
Loans in process		(1,596	)					27,984
Unamortized loan fees, net		1,380						5,972
Allowance for loan losses		(90,472	)					(85,833	)
Bank loans, net	$	8,964,325					$	8,517,615

At June 30, 2019 and December 31, 2018, Stifel Bancorp had loans outstanding to its executive officers and directors and executive officers and directors of certain affiliated entities in the amount of $22.6 million and $28.8 million, respectively.

At June 30, 2019 and December 31, 2018, we had loans held for sale of $163.5 million and $205.6 million, respectively. For the three months ended June 30, 2019 and 2018, we recognized gains of $2.3 million and $2.7 million, respectively, from the sale of originated loans, net of fees and costs. For the six months ended June 30, 2019 and 2018, we recognized gains of $3.2 million and $5.2 million, respectively, from the sale of originated loans, net of fees and costs.

The following tables detail activity in the allowance for loan losses by portfolio segment for the three and six months ended June 30, 2019 (in thousands).

	Three Months Ended June 30, 2019
	Beginning Balance		Provision		Charge-offs			Recoveries		Ending Balance
Commercial and industrial	$	68,566	$	743	$	(46	)	$	—	$	69,263
Residential real estate		11,585		457		—			—		12,042
Securities-based loans		2,227		84		—			—		2,311
Commercial real estate		2,421		57		—			—		2,478
Construction and land		1,724		678		—			—		2,402
Home equity lines of credit		372		49		—			—		421
Other		146		40		(8	)		1		179
Qualitative		1,131		245		—			—		1,376
	$	88,172	$	2,353	$	(54	)	$	1	$	90,472

	Six Months Ended June 30, 2019
	Beginning Balance		Provision		Charge-offs			Recoveries		Ending Balance
Commercial and industrial	$	68,367	$	954	$	(58	)	$	—	$	69,263
Residential real estate		11,228		727		—			87		12,042
Securities-based loans		1,978		333		—			—		2,311
Commercial real estate		1,778		700		—			—		2,478
Construction and land		1,241		1,161		—			—		2,402
Home equity lines of credit		310		110		—			1		421
Other		88		118		(52	)		25		179
Qualitative		843		533		—			—		1,376
	$	85,833	$	4,636	$	(110	)	$	113	$	90,472

The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at June 30, 2019 (in thousands):

	Allowance for Loan Losses						Recorded Investment in Loans
	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial and industrial	$	8,304	$	60,959	$	69,263	$	21,995	$	3,316,132	$	3,338,127
Residential real estate		24		12,018		12,042		1,121		2,983,604		2,984,725
Securities-based loans		—		2,311		2,311		—		1,962,528		1,962,528
Commercial real estate		—		2,478		2,478		—		367,283		367,283
Construction and land		—		2,402		2,402		—		226,559		226,559
Home equity lines of credit		—		421		421		184		49,025		49,209
Other		20		159		179		165		137,682		137,847
Qualitative		—		1,376		1,376		—		—		—
	$	8,348	$	82,124	$	90,472	$	23,465	$	9,042,813	$	9,066,278

The following tables detail activity in the allowance for loan losses by portfolio segment for the three and six months ended June 30, 2018 (in thousands).

	Three Months Ended June 30, 2018
	Beginning Balance		Provision			Charge-offs		Recoveries		Ending Balance
Commercial and industrial	$	56,433	$	3,139		$	—	$	—	$	59,572
Residential real estate		8,779		549			—		—		9,328
Securities-based loans		1,894		34			—		—		1,928
Commercial real estate		1,320		352			—		—		1,672
Home equity lines of credit		164		64			—		1		229
Construction and land		199		104			—		—		303
Other		15		(2	)		—		—		13
Qualitative		693		37			—		—		730
	$	69,497	$	4,277		$	—	$	1	$	73,775

	Six Months Ended June 30, 2018
	Beginning Balance		Provision			Charge-offs			Recoveries		Ending Balance
Commercial and industrial	$	54,474	$	5,110		$	(12	)	$	—	$	59,572
Residential real estate		8,430		898			—			—		9,328
Securities-based loans		2,088		(160	)		—			—		1,928
Commercial real estate		1,520		152			—			—		1,672
Home equity lines of credit		162		65			—			2		229
Construction and land		100		203			—			—		303
Other		16		(2	)		(2	)		1		13
Qualitative		676		54			—			—		730
	$	67,466	$	6,320		$	(14	)	$	3	$	73,775

The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at December 31, 2018 (in thousands):

	Allowance for Loan Losses						Recorded Investment in Loans
	Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total		Individually Evaluated for Impairment		Collectively Evaluated for Impairment		Total
Commercial and industrial	$	8,678	$	59,689	$	68,367	$	23,677	$	3,280,557	$	3,304,234
Residential real estate		24		11,204		11,228		519		2,874,495		2,875,014
Securities-based loans		—		1,978		1,978		—		1,786,966		1,786,966
Commercial real estate		—		1,778		1,778		—		318,961		318,961
Construction and land		—		1,241		1,241		—		138,245		138,245
Home equity lines of credit		—		310		310		184		37,914		38,098
Other		1		87		88		21		120,108		120,129
Qualitative		—		843		843		—		—		—
	$	8,703	$	77,130	$	85,833	$	24,401	$	8,557,246	$	8,581,647

In determining the amount of our allowance, we rely on an analysis of our loan portfolio, our experience and our evaluation of general economic conditions. If our assumptions prove to be incorrect, our current allowance may not be sufficient to cover future loan losses and we may experience significant increases to our provision.

There are two components of the allowance for loan losses: the inherent allowance component and the specific allowance component.

The inherent allowance component of the allowance for loan losses is used to estimate the probable losses inherent in the loan portfolio and includes non-homogeneous loans that have not been identified as impaired and portfolios of smaller balance homogeneous loans. The Company maintains methodologies by loan product for calculating an allowance for loan losses that estimates the inherent losses in the loan portfolio. Qualitative and environmental factors such as economic and business conditions, nature and volume of the portfolio and lending terms, and volume and severity of past due loans may also be considered in the calculations. The allowance for loan losses is maintained at a level reasonable to ensure that it can adequately absorb the estimated probable losses inherent in the portfolio.

The specific allowance component of the allowance for loan losses is used to estimate probable losses for non-homogeneous exposures, including loans modified in a troubled debt restructuring, which have been specifically identified for impairment analysis by the Company and determined to be impaired. At June 30, 2019, we had $23.5 million of impaired loans, net of discounts, which included $7.9 million in troubled debt restructurings. The specific allowance on impaired loans at June 30, 2019 was $8.3 million. At December 31, 2018, we had $24.4 million of impaired loans, net of discounts, which included $9.1 million in troubled debt restructurings. The specific allowance on impaired loans at December 31, 2018 was $8.7 million. The gross interest income related to impaired loans, which would have been recorded, had these loans been current in accordance with their original terms, and the interest income recognized on these loans during the three and six months ended June 30, 2019 and 2018, were insignificant to the consolidated financial statements.

The tables below present loans that were individually evaluated for impairment by portfolio segment at June 30, 2019 and December 31, 2018, including the average recorded investment balance for the year to date period presented (in thousands):

	June 30, 2019
	Unpaid Contractual Principal Balance		Recorded Investment with No Allowance		Recorded Investment with Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial and industrial	$	21,995	$	216	$	21,779	$	21,995	$	8,304	$	23,460
Residential real estate		1,191		955		166		1,121		24		838
Home equity lines of credit		184		184		—		184		—		184
Other		315		—		165		165		20		199
Total	$	23,685	$	1,355	$	22,110	$	23,465	$	8,348	$	24,681

	December 31, 2018
	Unpaid Contractual Principal Balance		Recorded Investment with No Allowance		Recorded Investment with Allowance		Total Recorded Investment		Related Allowance		Average Recorded Investment
Commercial and industrial	$	23,677	$	242	$	23,435	$	23,677	$	8,678	$	23,807
Residential real estate		544		352		167		519		24		275
Home equity lines of credit		184		184		—		184		—		184
Other		694		11		10		21		1		70
Total	$	25,099	$	789	$	23,612	$	24,401	$	8,703	$	24,336

The following tables present the aging of the recorded investment in past due loans at June 30, 2019 and December 31, 2018 by portfolio segment (in thousands):

	As of June 30, 2019
	30 – 89 Days Past Due		90 or More Days Past Due		Total Past Due		Current Balance		Total
Commercial and industrial	$	—	$	14,211	$	14,211	$	3,323,916	$	3,338,127
Residential real estate		2,385		892		3,277		2,981,448		2,984,725
Securities-based loans		—		—		—		1,962,528		1,962,528
Commercial real estate		—		—		—		367,283		367,283
Construction and land		—		—		—		226,559		226,559
Home equity lines of credit		184		—		184		49,025		49,209
Other		—		155		155		137,692		137,847
Total	$	2,569	$	15,258	$	17,827	$	9,048,451	$	9,066,278

	As of June 30, 2019*
	Non-Accrual		Restructured		Total
Commercial and industrial	$	14,211	$	7,715	$	21,926
Residential real estate		955		166		1,121
Home equity lines of credit		184		—		184
Other		165		—		165
Total	$	15,515	$	7,881	$	23,396

	As of December 31, 2018
	30 – 89 Days Past Due		90 or More Days Past Due		Total Past Due		Current Balance		Total
Commercial and industrial	$	—	$	14,656	$	14,656	$	3,289,578	$	3,304,234
Residential real estate		6,970		377		7,347		2,867,667		2,875,014
Securities-based loans		—		—		—		1,786,966		1,786,966
Commercial real estate		—		—		—		318,961		318,961
Construction and land		—		—		—		138,245		138,245
Home equity lines of credit		33		—		33		38,065		38,098
Other		—		134		134		119,995		120,129
Total	$	7,003	$	15,167	$	22,170	$	8,559,477	$	8,581,647

	As of December 31, 2018*
	Non-Accrual		Restructured		Total
Commercial and industrial	$	14,741	$	8,936	$	23,677
Residential real estate		352		167		519
Home equity lines of credit		184		—		184
Other		21		—		21
Total	$	15,298	$	9,103	$	24,401

Loans meet the definition of Pass when they are performing and do not demonstrate adverse characteristics that are likely to result in a credit loss. A loan is determined to be impaired when principal or interest becomes 90 days past due or when collection becomes uncertain. At the time a loan is determined to be impaired, the accrual of interest and amortization of deferred loan origination fees is discontinued (“non-accrual status”), and any accrued and unpaid interest income is reversed.

We closely monitor economic conditions and loan performance trends to manage and evaluate our exposure to credit risk. Trends in delinquency ratios are an indicator, among other considerations, of credit risk within our loan portfolio. The level of nonperforming assets represents another indicator of the potential for future credit losses. Accordingly, key metrics we track and use in evaluating the credit quality of our loan portfolio include delinquency and nonperforming asset rates, as well as charge-off rates and our internal risk ratings of the loan portfolio. In general, we are a secured lender. At June 30, 2019 and December 31, 2018, 98.1% and 98.4% of our loan portfolio was collateralized, respectively. Collateral is required in accordance with the normal credit evaluation process based upon the creditworthiness of the customer and the credit risk associated with the particular transaction. The Company uses the following definitions for risk ratings:

Pass. A credit exposure rated pass has a continued expectation of timely repayment, all obligations of the borrower are current, and the obligor complies with material terms and conditions of the lending agreement.

Special Mention. Extensions of credit that have potential weakness that deserve management’s close attention, and if left uncorrected may, at some future date, result in the deterioration of the repayment prospects or collateral position.

Substandard. Obligor has a well-defined weakness that jeopardizes the repayment of the debt and has a high probability of payment default with the distinct possibility that the Company will sustain some loss if noted deficiencies are not corrected.

Doubtful. Inherent weakness in the exposure makes the collection or repayment in full, based on existing facts, conditions and circumstances, highly improbable, and the amount of loss is uncertain.

Substandard loans are regularly reviewed for impairment. Doubtful loans are considered impaired. When a loan is impaired the impairment is measured based on the present value of expected future cash flows discounted at the loan’s effective interest rate, or as a practical expedient, the observable market price of the loan or the fair value of the collateral if the loan is collateral dependent.

Based on the most recent analysis performed, the risk category of our loan portfolio was as follows (in thousands):

	As of June 30, 2019
	Pass		Special Mention		Substandard		Doubtful		Total
Commercial and industrial	$	3,299,366	$	12,332	$	26,429	$	—	$	3,338,127
Residential real estate		2,983,456		148		1,121		—		2,984,725
Securities-based loans		1,962,528		—		—		—		1,962,528
Commercial real estate		367,283		—		—		—		367,283
Construction and land		226,559		—		—		—		226,559
Home equity lines of credit		49,025		—		184		—		49,209
Other		137,682		—		—		165		137,847
Total	$	9,025,899	$	12,480	$	27,734	$	165	$	9,066,278

	As of December 31, 2018
	Pass		Special Mention		Substandard		Doubtful		Total
Commercial and industrial	$	3,254,698	$	34,795	$	14,741	$	—	$	3,304,234
Residential real estate		2,874,495		—		519		—		2,875,014
Securities-based loans		1,786,966		—		—		—		1,786,966
Commercial real estate		318,961		—		—		—		318,961
Construction and land		138,245		—		—		—		138,245
Home equity lines of credit		37,914		—		184		—		38,098
Other		119,912		196		—		21		120,129
Total	$	8,531,191	$	34,991	$	15,444	$	21	$	8,581,647