Some financial instruments, such as loan commitments, credit lines, letters of credit and overdraft protection, are issued to meet customers’ financing needs. These are agreements to provide credit or to support the credit of others, as long as the conditions established in the contract are met, and usually have expiration dates. Commitments may expire without being used. Off-balance-sheet risk of credit loss exists up to the face amount of these instruments, although material losses are not anticipated. The same credit policies are used to make such commitments as are used for loans, including obtaining collateral at exercise of commitment. The contractual amounts of financial instruments with off-balance-sheet risk were as follows for March 31, 2019 and December 31, 2018:

	Contract Amount
	March 31, 2019				December 31, 2018
	Fixed Rate		Variable Rate		Fixed Rate		Variable Rate
Commitment to extend credit:
Lines of credit and construction loans	$	14,051	$	360,954	$	14,984	$	359,220
Overdraft protection		4		47,276		3		37,201
Letters of credit		624		921		624		850
	$	14,679	$	409,151	$	15,611	$	397,271

Commitments to make loans are generally made for a period of one year or less. Fixed rate loan commitments included in the table above had interest rates ranging from 2.88% to 8.50% at March 31, 2019 and December 31, 2018, respectively. Maturities extend up to 30 years.

Civista is required to maintain certain reserve balances on hand in accordance with the Federal Reserve Board requirements. The reserve balance maintained in accordance with such requirements was $87,310 on March 31, 2019 and $8,891 on December 31, 2018.