Accounting Policies - Earnings Per Share Anti-Dilutive (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Stock Options and SARs [Members]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share (shares)	36,983	296,873	43,640	[1]	412,009	[1]
Performance Shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from earnings per share (shares)	44,894	106,300	38,363	[1]	97,300	[1]

[1] For the nine months ended September 30, 2013 and 2012, stock options and SARs of 43,640 and 412,009, respectively, were outstanding but not included in the computation of diluted earnings per share of common stock because they were anti-dilutive. For the nine months ended September 30, 2013 and 2012, contingent shares of non-vested restricted stock of 38,363 and 97,300, respectively, were outstanding but not included in the computation of diluted earnings per share of common stock because performance conditions were not met.