Stock-Based Compensation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended			3 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 30, 2013 Performance Shares [Member]	Sep. 30, 2013 Restricted Stock [Member]	Sep. 30, 2013 Stock Appreciation Rights (SARs) [Member]	Sep. 30, 2013 Director [Member]	Sep. 30, 2013 Director [Member] Stock Options [Member]	Sep. 30, 2013 Director [Member] Restricted Stock [Member]	Sep. 30, 2013 Chief Executive Officer [Member] Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense		$ 2.0	$ 0.3	$ 1.3
Vesting Period					3 years
SSARS Expiration Date	P10Y
Unrecognized compensation costs		$ 3.9						$ 2.9	$ 0.9
Weighted-average period of years costs are expected to be recognied over		1 year 1 month 6 days						1 year 3 months 18 days	2 years 7 months 6 days
Number of months for options to vest at an incremental rate of ten percent for directors							3 months
Starting Term When Options Become Exercisable After Grant Date						3 months