Loans
Loans increased $491 million, or 6.6%, to $7.9 billion as of March 31, 2022, compared to $7.4 billion as of December 31, 2021, and increased $2.3 billion, or 40.3%, compared to $5.6 billion as of March 31, 2021. The year over year increase was impacted by the acquisition of TGR Financial in the fourth quarter of 2021, which added $1.06 billion in gross loans, or $1.05 billion of net loans held for investment after purchase accounting adjustments. Loan balances were also affected by loan fundings, which in the first quarter of 2022 were $1.1 billion, a decrease of $65 million, or 5.4%, from the fourth quarter of 2021 and an increase of $383 million, or 50.0%, from the first quarter of 2021. Contributing to loan originations during the quarter, our C&I division funded $482 million of new commercial loans during the first quarter of 2022, of which 49% were adjustable commercial revolving lines of credit. The remaining C&I originations were comprised of $125 million of commercial term loans, $76 million of public finance loans, $15 million of owner occupied commercial real estate loans, and $28 million of equipment finance leases. Loan balances during the first quarter of 2022 were also impacted by loan payoffs of $657 million, compared to payoffs of $670 million in the fourth quarter of 2021 and $500 million in the first quarter of 2021. The current pipeline continues to remain very strong going into the second quarter.
Investment Securities
Investment securities were $1.2 billion as of March 31, 2022 and December 31, 2021, and increased $431.3 million, or 56.9%, compared to $749.2 million as of March 31, 2021. The increase in the balance of investment securities compared to the first quarter of 2021 was primarily driven by securities purchases in the fourth quarter of 2021, as excess liquidity from the TGR Financial acquisition was deployed, and the result of $221.8 million of investment securities, net of the fair value adjustment, acquired in connection with the acquisition. $917 million in securities, with $39.7 million in unrealized losses, were transferred from available-for-sale to held-to-maturity in the first quarter of 2022.
The allowance for credit losses for investments increased by $0.3 million from the prior quarter, to $10.7 million as of March 31, 2022, from $10.4 million as of December 31, 2021, and increased $1.8 million, from $8.9 million as of March 31, 2021. The increase was a result of faster than expected prepayments that negatively impacted the projected cash flows on interest-only strip securities.
Deposits and Borrowings
Deposits were $9.0 billion as of March 31, 2022, an increase of $146 million, or 1.7%, compared to $8.8 billion as of December 31, 2021, and an increase of $2.7 billion, or 43.4%, compared to $6.2 billion as of March 31, 2021. Deposit growth during the first quarter of 2022 compared to the first quarter of 2021 was primarily driven by an increase of $1.1 billion, or 51%, in non-interest bearing demand deposits, an increase of $1.4 billion, or 140%, in interest bearing demand deposits, and an increase in money market and savings accounts of $307.4 million, largely attributable to our commercial deposit services division, and retail branches, and the acquisition of TGR Financial, which contributed $2.2 billion of deposits after purchase accounting adjustments. The increases in deposits were offset by a reduction in CDs of $125.9 million, primarily due to our intentional run-off of higher cost brokered deposits. Noninterest-bearing demand deposits measured 36.8% of total deposits as of March 31, 2022, compared to 37.2% of total deposits as of December 31, 2021, while core deposits increased by $146 million compared to the linked quarter, and measured 99% of total deposits as of March 31, 2022 and December 31, 2021. Commercial business deposits were 72% of total core deposits as of March 31, 2022.