Earnings per Share (Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share) (Details) - shares	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014		Jun. 30, 2015	Jun. 30, 2014
Earnings per Share [Abstract]
Basic method	174,488,842	178,500,440		176,343,309	180,003,605
Dilutive stock options and restricted stock units	0	1,544,580	[1]	0	1,324,309	[1]
Diluted method	174,488,842	180,045,020		176,343,309	181,327,914

[1] Due to a net loss recognized by the Company for the three-month and six-month periods ended June 30, 2015, no unvested stock awards were included in computing earnings per share because the effect was anti-dilutive.