Business Combinations (Narrative) (Details) - Saudi Arabia-based Joint Venture - USD ($)	9 Months Ended
	Jun. 30, 2017	May 19, 2017
Business Acquisition [Line Items]
Date of joint venture agreement	May 19, 2017
Percentage of ownership interest in joint venture		50.00%
Initial capital contributions to joint venture		$ 6,500,000
Loan commitment to joint venture		7,000,000
Additional future loans commitments to joint venture		$ 7,000,000