Final day in office for Senator Richard Lugar

INDIANAPOLIS (AP) -- After serving Indiana for nearly four decades U.S. Senator Richard Lugar is leaving office Thursday.

His last vote was an act of compromise in support of Congress' fiscal cliff deal. Lugar has cast 13,067 votes during his time in Washington.

U.S. Representative Joe Donnelly will be sworn in as Indiana's newest senator after defeating State Treasurer Richard Mourdock in November's election.

Lugar's final vote caps decades of work across party lines. That compromise helped lead to his ouster in last year's Republican primary by Mourdock.

Lugar's service places him tenth on the list of total votes cast in a Senate career. West Virginia's late Senator Robert Byrd tops that list with 18,689 votes cast over 50 years in the chamber.