COLUMBUS, Ohio -- An American arrested and detained in North Korea is headed back to the job he lost while abroad, with an agreement that his travel was risky and he could be fired for doing it again.

Jeffrey Fowle disregarded cautions by the U.S. Secretary of State, his family and acquaintances in travelling to North Korea, according to Tuesday's agreement between Fowle and the city of Moraine, Ohio.

Fowle should have known detention was a likely result of travelling there, the agreement said.

"Fowle's decision to travel to North Korea (and the resulting unauthorized absence) seriously called into question Fowle's judgment, leadership skills, and priorities, and have raised serious questions about his ability to carry out his job," according to the agreement signed by Fowle and city manager David Hicks.

A 56-year-old married father of three, Fowle returned home last week after negotiations involving retired diplomat and former Ohio Congressman Tony Hall. He'd been detained nearly six months for allegedly leaving a Bible in a nightclub. A message seeking comment was left with his attorney.

Fowle had worked for the city for 26 years, and Moraine kept him on the payroll even after his available leave was exhausted, Mayor Elaine Allison said Oct. 22, the day Fowle returned home. The city also worked to keep his family's medical coverage going, and was prepared to provide about $70,000 in severance pay, which was never distributed.

Fowle thanked the city for helping "secure my family's future during this difficult time" in a handwritten letter to Hicks Tuesday.

"I look forward to serving the citizens of Moraine again in the Street Department," Fowle said.

Though a small number of U.S. citizens visit North Korea each year as tourists, the State Department strongly advises against it.

Fowle arrived in North Korea on April 29. He is suspected of leaving a Bible in a nightclub in the northern port city of Chongjin.

Two other Americans are still in North Korea. Matthew Miller is serving a six-year jail term on charges of espionage, after he allegedly ripped up his tourist visa at Pyongyang's airport in April and demanded asylum.

Kenneth Bae, a Korean-American missionary with health problems, was sentenced to 15 years in jail for alleged anti-government activities. He was arrested in November 2012 while leading a tour group in a special North Korean economic zone.