Earnings per Share (Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income per Common Share) (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings per Share [Abstract]
Basic method	172,173,012	174,351,227	178,852,942
Dilutive stock options and restricted stock units	0	0	1,218,042	[1]
Diluted method	172,173,012	174,351,227	180,070,984

[1] Due to a net loss recognized by the Company for the year ended December 31, 2016 and 2015, no unvested stock awards were included in the computation of diluted earnings per share because the effect would have been anti-dilutive.