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Commitments and Financial Instruments with Off-Balance-Sheet Risk | 3 Months Ended
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Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Financial Instruments with Off-Balance-Sheet Risk | Commitments and Financial Instruments with Off-Balance-Sheet Risk 1st Source and its subsidiaries are parties to financial instruments with off-balance-sheet risk in the normal course of business. These off-balance-sheet financial instruments include commitments to originate and sell loans and standby letters of credit. The instruments involve, to varying degrees, elements of credit and interest rate risk in excess of the amount recognized in the Statements of Financial Condition. The exposure to credit loss in the event of nonperformance by the other party to the financial instruments for loan commitments and standby letters of credit is represented by the dollar amount of those instruments. The Company uses the same credit policies and collateral requirements in making commitments and conditional obligations as it does for on-balance-sheet instruments. The following table shows financial instruments whose contract amounts represent credit risk.
(Dollars in thousands) |  | March 31, 2016 |  | December 31, 2015
Amounts of commitments: |  |  |  |
Loan commitments to extend credit |  | $ | 853,202 |  |  | $ | 829,509 |
Standby letters of credit |  | $ | 39,563 |  |  | $ | 37,984 |
Commercial and similar letters of credit |  | $ | 611 |  |  | $ | 741 |
1st Source Bank (Bank), a subsidiary of 1st Source Corporation, grants mortgage loan commitments to borrowers, subject to normal loan underwriting standards. The interest rate risk associated with these loan commitments is managed by entering into contracts for future deliveries of loans. Loan commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. Since many of the commitments are expected to expire without being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. The Bank issues standby letters of credit which are conditional commitments that guarantee the performance of a client to a third party. The credit risk involved in and collateral obtained when issuing standby letters of credit is essentially the same as that involved in extending loan commitments to clients. Standby letters of credit generally have terms ranging from six months to one year. Commercial letters of credit are issued specifically to facilitate commerce and typically result in the commitment being drawn on when the underlying transaction is consummated between the customer and the third party. Commercial letters of credit generally have terms ranging from three months to six months. The Bank has made investments directly in low income housing tax credit (LIHTC) operating partnerships formed by third parties. As a limited partner in these operating partnerships, we are allocated credits and deductions associated with the underlying properties. The Bank has determined that it is not the primary beneficiary of these investments because the general partners have the power to direct the activities that most significantly influence the economic performance of their respective partnerships. At March 31, 2016 and December 31, 2015, investment balances, including all legally binding commitments to fund future investments totaled $9.45 million and $9.62 million, respectively. In addition, the Bank had a liability for all legally binding unfunded commitments of $3.64 million at March 31, 2016 and December 31, 2015.

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