Earnings per Share (Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share) (Details) - shares		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings per Share [Abstract]
Basic method		174,351,227	178,852,942	187,921,062
Dilutive stock options and restricted stock units	[1]		1,218,042	1,350,336
Diluted method		174,351,227	180,070,984	189,271,398

[1] Due to a net loss recognized by the Company for the year ended December 31, 2015, no unvested stock awards were included in the computation of diluted earnings per share because the effect would have been anti-dilutive.