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Other Employee Benefits	6 Months Ended
Other Employee Benefits	Jun. 30, 2015
Postemployment Benefits [Abstract]
Other employee benefits	Other Employee Benefits In November 2007, the Company adopted the American Public Education Employee Stock Purchase Plan, or the ESPP, which was implemented effective July 1, 2008. There were initially 100,000 shares of common stock available for purchase by participating employees under the ESPP. On June 13, 2014, the Company's shareholders approved an amendment to the ESPP to increase the number of shares of the Company’s common stock available for issuance under the plan by 100,000 shares, extend the term of the ESPP to March 7, 2024, and make other administrative changes. As of June 30, 2015, 83,166 shares remained available for purchase under the ESPP. In June 2015, the Company's 401K Plan, or the Plan, was amended so that effective August 31, 2015, the Plan will no longer allow participants to invest future contributions in the Company's common stock. The Plan will completely remove the Company's common stock as an investment election on June 30, 2016. Any of the Company's common stock held by Plan participants as of June 30, 2016 will be sold and automatically re-allocated to an age-appropriate mutual fund.