Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)	6 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Series A Preferred Stock [Member]
Preferred stock dividend rate		7.625%

The percentage rate used to calculate dividend payments on preferred stock.

No definition available.

Name:	us-gaap_PreferredStockDividendRatePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration