Stock Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended			0 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Stock Options [Member]	Mar. 01, 2013 Restricted Stock [Member]	Jun. 30, 2013 Restricted Stock [Member]	Jun. 30, 2013 2008 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for grant under plan (in shares)								3,000,000
Vesting period, in years					3 years
Option expiration period					10 years
Allocated share-based compensation expense	$ 1.1	$ 0.9	$ 1.5	$ 1.6
Total unrecognized compensation cost related to non-vested share based compensation arrangements					4.8
Recognition period for unrecognized stock compensation					3 years
Options granted (in shares)			323,400
The total intrinsic value of all stock options exercised	$ 0.8	$ 1.3	$ 1.4	$ 1.4
Granted (in shares)						169,100	169,100
Granted, Average Grant Date Fair Value (in dollars per share)						$ 14.77	$ 14.77