Subsequent Events (Details) - $ / shares		3 Months Ended			6 Months Ended
	May. 05, 2015	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Subsequent Event [Line Items]
Cash dividend declared per common share		$ 0.11	$ 0.11	$ 0.10	$ 0.22	$ 0.20
Dividends payable, payable date		May 29, 2015	Mar. 31, 2015
Dividends payable, record date		May 22, 2015	Mar. 24, 2015
Dividend declared date		May 05, 2015	Mar. 17, 2015
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash dividend declared per common share	$ 0.11
Dividends payable, payable date					Aug. 28, 2015
Dividends payable, record date					Aug. 21, 2015
Dividend declared date					Aug. 04, 2015