Goodwill and Intangible Assets	6 Months Ended
Mar. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	9. Goodwill and Intangible Assets During the three months ended March 31, 2019 we completed our annual assessment for impairment of goodwill and other intangible assets. No material impairment losses were recognized in the current or prior periods presented in connection with our goodwill and other intangible assets. For the three months ended March 31, 2019 and 2018, amortization expense related to other intangible assets was $2.9 million and $2.7 million, respectively, and, for the six months ended March 31, 2019 and 2018, amortization expense was $5.7 million and $5.6 million, respectively. During the six months ended March 31, 2019, we recorded approximately $1.9 million in other intangible assets related to immaterial asset acquisitions. Additionally, goodwill and other intangible assets were negatively impacted from changes in foreign currency exchange rates of approximately $2.6 million and $0.6 million, respectively.

Goodwill and Intangible Assets

6 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

9. Goodwill and Intangible Assets

During the three months ended March 31, 2019 we completed our annual assessment for impairment of goodwill and other intangible assets. No material impairment losses were recognized in the current or prior periods presented in connection with our goodwill and other intangible assets.

For the three months ended March 31, 2019 and 2018, amortization expense related to other intangible assets was $2.9 million and $2.7 million, respectively, and, for the six months ended March 31, 2019 and 2018, amortization expense was $5.7 million and $5.6 million, respectively.

During the six months ended March 31, 2019, we recorded approximately $1.9 million in other intangible assets related to immaterial asset acquisitions. Additionally, goodwill and other intangible assets were negatively impacted from changes in foreign currency exchange rates of approximately $2.6 million and $0.6 million, respectively.