Dividends (Details) - $ / shares		3 Months Ended
	Jul. 18, 2017	Sep. 30, 2017	Sep. 30, 2016	Mar. 31, 2016
Dividends Payable [Line Items]
Cash dividends declared on common stock (in dollars per share)		$ 0.0975	$ 0.0950
2017 Annual Dividend [Member]
Dividends Payable [Line Items]
Cash dividends declared on common stock (in dollars per share)				$ 0.38
2017 Q4 Dividend [Member]
Dividends Payable [Line Items]
Dividends payable, date declared		Jul. 18, 2017
Cash dividends declared on common stock (in dollars per share)	$ 0.0975
Dividends payable, date of record		Aug. 15, 2017
Dividends payable, date paid		Aug. 31, 2017
2018 Annual Dividend [Member]
Dividends Payable [Line Items]
Cash dividends declared on common stock (in dollars per share)	$ 0.39