A bookkeeper from Huntington who admitted to stealing $866,114 from her employer over a six-year period was sentenced Tuesday to 3 to 9 years in prison and ordered to pay restitution for the full amount, prosecutors said.

Lori Maceluch, 48, used the money stolen from a Locust Valley architecture firm to take vacations to Fire Island and the Dominican Republic, among other locales, officials said. She also used the money to dine, shop and make credit card payments, according to the Nassau County district attorney's office.

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Maceluch pleaded guilty in January to second-degree grand larceny and two counts of second-degree criminal possession of a forged instrument, prosecutors said. Nassau County Court Judge Alan Honorof handed down the sentence Tuesday.

The theft was discovered in late 2011 when an internal audit of the company uncovered discrepancies in the accounts payable and accounts receivable, officials said. Maceluch was fired shortly thereafter.

Between May 2005 and September 2011, Maceluch used her position as bookkeeper to steal from the firm's operating account "by forging a firm partner's signature on 568 checks she wrote to herself," District Attorney Kathleen Rice said in a statement.