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Commitments and Credit Risk
 3 Months Ended
Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Credit Risk Commitments and Credit Risk
Commitments
The Company had the following commitments at March 31, 2020 and December 31, 2019:
March 31, 2020December 31, 2019
(Dollars in thousands)
Commitments to originate loans$182,941  $134,652  
Standby letters of credit34,828  39,035  
Lines of credit1,204,712  1,351,873  
Future lease commitments22,394  20,935  
Total$1,444,875  $1,546,495  
Concentrations of Credit Risk
As of March 31, 2020, the Company’s energy portfolio represented 10% of gross loans. The energy portfolio is subdivided into exploration and production for oil and natural gas, which represented approximately 65% and 35%, respectively of the energy portfolio at March 31, 2020. The dramatic decrease in demand for oil and natural gas created by the COVID-19 pandemic put considerable pricing volatility and uncertainty in the market. Depressed prices may strain our customer’s cash flows, lower their liquidity, and decrease property values that could create negative grade migration over the next several quarters. The length of the COVID-19 pandemic disruption and the pace of economic recovery will determine the severity of the grade migration and potential loss impact within the energy portfolio. Information pertaining to the energy portfolio may be found within Note 4: Loans and Allowance for Loan Losses.