Shareholders' Equity (Details) - $ / shares	Oct. 25, 2018	Jul. 25, 2018	Apr. 25, 2018	Jan. 25, 2018
Subsequent Event [Line Items]
Declared quarterly cash dividend		$ 0.26	$ 0.26	$ 0.22
Subsequent Event [Member]
Subsequent Event [Line Items]
Common Stock, Special Cash Dividends, Per Share, Declared	$ 0.14
Declared quarterly cash dividend	$ 0.26