Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Goodwill and Intangibles (Details)	6 Months Ended
	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Document Period End Date	Mar. 31, 2018
Customer Relationships [Member] | Weighted average
Finite-Lived Intangible Assets [Line Items]
Amortization period, intangible asset	17 years 11 months
Customer Relationships [Member] | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period, intangible asset	20 years
Technology Assets [Member] | Weighted average
Finite-Lived Intangible Assets [Line Items]
Amortization period, intangible asset	11 years 5 months
Technology Assets [Member] | Maximum
Finite-Lived Intangible Assets [Line Items]
Amortization period, intangible asset	18 years
Trade Names [Member] | Weighted average
Finite-Lived Intangible Assets [Line Items]
Amortization period, intangible asset	6 years 2 months