Subsequent Events (Details) (USD $)	0 Months Ended			3 Months Ended			0 Months Ended	9 Months Ended
	Sep. 19, 2014	Jun. 20, 2014	Mar. 20, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Oct. 29, 2014 Subsequent event	Sep. 30, 2014 Subsequent event
Subsequent event
Quarterly cash dividend (in dollars per share)	$ 0.125	$ 0.125	$ 0.125				$ 0.125
Dividends payable date declared								Oct. 29, 2014
Dividends payable date of record				Aug. 29, 2014	May 30, 2014	Feb. 28, 2014		Nov. 28, 2014
Dividends payable date to be paid								Dec. 18, 2014