Employee Benefit Plans (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Proceeds from exercise of stock options	$ 200,000	$ 1,400,000
Total intrinsic value of stock options exercised	100,000	200,000
Stock-based compensation expense related to restricted shares	200,000	100,000
Total expense associated with the retirement benefit plan	200,000	200,000
Contributions made by company	100,000	83,000
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	100,000	100,000
Unrecognized stock-based compensation expense	600,000
Weighted-average period, unrecognized expense expected to be recognized	1 year 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	412,000
Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized stock-based compensation expense	$ 3,600,000
Weighted-average period, unrecognized expense expected to be recognized	3 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	227,000
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