Derivative Instruments - Narrative (Details) - USD ($) |
3 Months Ended | |
---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
Gain (loss) from components excluded from assessment of cash flow hedge effectiveness, net | $ 0 | $ 0 |
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net | 0 | $ 0 |
Cash flow hedge gain (loss) to be reclassified within twelve months | $ 2,600,000 |