Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Proceeds from exercise of stock options	$ 0.6	$ 1.4
Total intrinsic value of stock options exercised	0.3	0.2
Stock-based compensation expense related to restricted shares	0.5	0.3
Total expense associated with the retirement benefit plan	0.4	0.4
Contributions made by company	0.2	0.2
Stock Appreciation Rights (SARs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Incentive stock options and SARs exercisable period	10 years
Employee Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Incentive stock options and SARs exercisable period	10 years
Stock-based compensation expense	0.1	0.1
Unrecognized stock-based compensation expense	0.5
Weighted-average period, unrecognized expense expected to be recognized	1 year 7 months 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	411,601
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized stock-based compensation expense	$ 3.3
Weighted-average period, unrecognized expense expected to be recognized	3 years 8 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	228,009
Maximum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Common stock issued upon the exercise of stock options, SARs and stock awards	750,000