Summary of Significant Accounting Policies (Tables)

3 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Realized gains (losses) on derivatives not designated as hedging instruments

	Three Months Ended
	December 31,
	2018		2017
Realized gains (losses) on derivatives not designated as hedging instruments	$	2,977	$	(1,673)