Stockholders' Equity Dividends Declared (Details) - $ / shares	May 02, 2019	Feb. 06, 2019
Dividends Declared [Abstract]
Dividend, declaration date	May 02, 2019	Feb. 06, 2019
Dividend amount to be paid, per common share	$ 0.4550	$ 0.4450
Dividend, date of record	May 20, 2019	Feb. 25, 2019
Dividend, date to be paid	Jun. 04, 2019	Mar. 12, 2019