Stockholders' Equity - Dividends (Details) - $ / shares													3 Months Ended								12 Months Ended
	Oct. 23, 2019	Jul. 24, 2019	Apr. 24, 2019	Jan. 23, 2019	Oct. 24, 2018	Jul. 24, 2018	Apr. 25, 2018	Jan. 24, 2018	Oct. 25, 2017	Jul. 25, 2017	Apr. 25, 2017	Jan. 25, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Subsequent Event [Line Items]
Declared	Oct. 23, 2019	Jul. 24, 2019	Apr. 24, 2019	Jan. 23, 2019	Oct. 24, 2018	Jul. 24, 2018	Apr. 25, 2018	Jan. 24, 2018	Oct. 25, 2017	Jul. 25, 2017	Apr. 25, 2017	Jan. 25, 2017
Cash dividends declared on common stock (in usd per share)	$ 0.19	$ 0.19	$ 0.18	$ 0.18	$ 0.17	$ 0.15	$ 0.15	$ 0.15	$ 0.13	$ 0.13	$ 0.13	$ 0.12	$ 0.29	$ 0.19	$ 0.18	$ 0.18	$ 0.27	$ 0.15	$ 0.15	$ 0.15	$ 0.84	$ 0.72	$ 0.61
Record Date	Nov. 07, 2019	Aug. 08, 2019	May 08, 2019	Feb. 07, 2019	Nov. 07, 2018	Aug. 09, 2018	May 10, 2018	Feb. 07, 2018	Nov. 08, 2017	Aug. 10, 2017	May 10, 2017	Feb. 09, 2017
Paid Date	Nov. 21, 2019	Aug. 22, 2019	May 22, 2019	Feb. 21, 2019	Nov. 21, 2018	Aug. 23, 2018	May 24, 2018	Feb. 21, 2018	Nov. 22, 2017	Aug. 24, 2017	May 24, 2017	Feb. 23, 2017
Special Dividend
Subsequent Event [Line Items]
Declared	Oct. 23, 2019				Oct. 24, 2018				Oct. 25, 2017
Cash dividends declared on common stock (in usd per share)	$ 0.10				$ 0.10				$ 0.10
Record Date	Nov. 07, 2019				Nov. 07, 2018				Nov. 08, 2017
Paid Date	Nov. 21, 2019				Nov. 21, 2018				Nov. 22, 2017