Net Income Per Common Share (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted earnings per share (in shares)	83,000	540,000	895,000
Exercise price range of stock options related to employee compensation plans - lower range limit (in dollars per share)	$ 12.50	$ 10.44	$ 8.19
Exercise price range of stock options related to employee compensation plans - upper range limit (in dollars per share)	$ 14.15	$ 14.15	$ 14.15
Non-Employee Directors' Deferred Fee Plan and Equity Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computation of diluted earnings per share (in shares)	1,238,542	864,114	557,480