Question: When did the man overthrown in the Libyan Crisis become the leader of Libya?

Context articles: Muammar Gaddafi
Refugees of the 2011 Libyan Civil War
2016 Libyan Premier League
Libya Herald
Fajr Libya militia
Demographics of Libya
Idris bin Abdullah al-Senussi
Bashir Saleh Bashir
Al Ahli SC (Tripoli)
Libyan Civil War (2011–present)

Muammar Mohammed Abu Minyar Gaddafi ( ;    ;  1942 20 October 2011), commonly known as Colonel Gaddafi, was a Libyan revolutionary, politician, and political theorist.
 He governed Libya as Revolutionary Chairman of the Libyan Arab Republic from 1969 to 1977, then as the "Brotherly Leader" of the Great Socialist People's Libyan Arab Jamahiriya from 1977 to 2011.
 He was initially ideologically committed to Arab nationalism and Arab socialism, but later came to rule under his own Third International Theory.
Refugees of the Libyan Civil War are the people, predominantly Libyans, who fled or were expelled from their homes during the Libyan Civil War, from within the borders of Libya to the neighbouring states of Tunisia, Egypt and Chad, as well as to European countries across the Mediterranean.
 The majority of Libyan refugees are Arabs and Berbers, though many of the other ethnicities temporarily living in Libya originated from sub-Saharan Africa.
 These groups were also among the first refugee waves to exit the country.
 The total number of Libyan refugees were estimated at around one million as of June 2011 and most returned after the civil war ended.
 As of January 2013, there were 5,252 refugees originating from Libya alongside 59,425 internally displaced persons registered by the UNHCR.
The 2015-16 season of the Libyan Premier League is the forty-fourth edition of the country's top level association football league since its inception in 1963.
 It came two and a half years after the last competition was held by the Libyan Football Federation (LFF) due to the security concerns and general unrest throughout the country during the Libyan Crisis and Libyan civil war (2014–present).
The Libya Herald (Arabic: ليبيا هيرلد‎ ‎ ) is an English-language newspaper based in Tripoli, Libya.
 It was launched on 17 February 2012, the first anniversary of the outbreak of the Libyan Civil War, and currently publishes news through its website, though plans are in place to launch a print edition in the near future.
 The Libya Herald was the initiative of Michel Cousins, a British journalist raised in Libya who has worked in the Arab world for much of his career.
 Cousins co-founded the paper together with Sami Zaptia, a Libyan journalist who worked for the state-owned "Tripoli Post" for ten years but resigned upon the outbreak of the Libyan Civil War, frustrated at the Gaddafi regime's strict censorship.
 Until January 2013, the paper's deputy editor was George Grant, a British journalist who also worked as Libya correspondent for "The Times" newspaper.
 Grant was subsequently forced to leave Libya following an abduction threat from suspected Islamists in Benghazi following an investigation he was conducting into a death list in the city.
The Fajr Libya militia or Fajr Libya battalion, is a war faction that participated in the Libyan Crisis which overthrew Muammar Gaddafi.
 Presently, the Fajr Libya militia is an opponent of the Islamic State of Iraq and the Levant and has been associated with the "Libya Dawn" movement in Libya.
Demographics of Libya include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the Libyan population.
 No complete population or vital statistics registration exists in Libya.
 Of the over 6,000,000 Libyans that lived in Libya prior to the Libyan Crisis, more than a million were immigrants.
 The estimates in this article are from which was prepared by the Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat, unless otherwise indicated.
Idris bin Abdullah al-Senussi (born 18 January 1957) is an exiled Libyan opposition figure and a claimant to the headship of the Sanussiyyah movement.
 While Libya’s legitimate royal family was under house arrest after Gaddafi overthrew their rule, Idris began claiming to be the heir to the Libyan throne, a claim that is contrary to the Constitution/Royal Decree.
 He has continued to claim he is the legitimate heir despite the fact that his cousin, Prince Mohammed El Senussi, is the designated heir of the last Libyan Crown Prince, and under the Constitution is the legitimate Heir to the Senussi Crown.
 However, he later stated that if the old Constitution of Libya (1951) (as amended in 1961) was restored post-Gaddafi, there would be free elections and the people would be united under the constitution with "some modifications where the part of the monarch will be taken out" and the people would be able to elect a head of state, who could be called "president or whatever they want to call him".
 The position of heir to the throne is also claimed by Prince Mohammed El Senussi, the son and designated heir of the last Libyan Crown Prince.
 Idris al-Senussi returned to Libya on 23 December 2011 and stated he would not be active in politics or campaigning for the monarchy.
 He returned to Libya in December 2011 with his cousin, Ahmed Zubair Al-Senussi.
Bashir Saleh Bashir was a former aide of former Libyan leader Muammar Gaddafi.
 He was head of the Libyan African Portfolio, a sovereign wealth fund that invested Libya’s oil wealth mostly in sub-Saharan Africa, and served as an intermediary between Libya, Africa and France.
 Bashir was captured after the Battle of Tripoli during the Libyan Civil War but later escaped.
 Libya demanded that he be extradited because it is believed he is in France.
 Bashir spent Libya's oil money solely for the Gaddafi family, buying up hotels, mineral resources and shares in companies, eventually becoming what some Libyan officials and financial experts describe as one of the largest single investors in Africa.
 Libyan authorities believe that finding him is the key to finding a missing 7 billion dollars in Libyan funds.
Al-Ahli Sports Club (English: National Sports Club ; Arabic: النادي الأهلي الرياضي‎ ‎ ), known as Al Ahli Tripoli, is a Libyan football club based in Tripoli, Libya.
 The club is the second most successful Libyan club in history, having won 12 Libyan Premier League titles, six Libyan Football Cups and a Libyan SuperCup.
 Alahly is known as the leader of Libyan Football clubs and has the largest number of fans in Libya.
The Libyan Civil War refers to the ongoing conflicts in Libya, beginning with the Arab Spring protests of 2011, which led to the First Libyan Civil War, foreign military intervention, and the ousting and death of Muammar Gaddafi.
 The civil war's aftermath and proliferation of armed groups led to violence and instability across the country, which erupted into renewed civil war in 2014.
 The ongoing crisis in Libya has so far resulted in tens of thousands of casualties since the onset of violence in early 2011.
 During both civil wars, the output of Libya's economically crucial oil industry collapsed to a small fraction of its usual level, with most facilities blockaded or damaged by rival groups, despite having the largest oil reserves of any African country.
 U.S. President Barack Obama stated on 11 April 2016 that not preparing for a post-Gaddafi Libya was probably the "worst mistake" of his presidency.