Earnings Per Share (Details) - $ / shares	3 Months Ended						12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Cash dividend declared per common share	$ 0.12	$ 0.12	$ 0.12	$ 0.12	$ 0.10	$ 0.10	$ 0.48	$ 0.20	$ 0
Cash dividend paid per common share							$ 0.48	$ 0.20	$ 0