Employee Benefit Plans (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Common stock issued as stock awards	16,876	16,000
Incentive stock options and SARs exercisable period	10 years	10 years
Proceeds from exercise of stock options	$ 488,000	$ 153,000
Total intrinsic value of stock options exercised	200,000	100,000
Unrecognized stock-based compensation expense	500,000
Weighted-average period, unrecognized expense expected to be recognized	1 year 8 months 12 days
Stock-based compensation expense related to restricted shares	300,000	300,000
Minimum age required to enroll in benefit plan	21	21
Employee's contribution that is matched	6.00%	6.00%
Percentage of matching contribution by the company	50.00%	50.00%
Vesting percentage of employee and employer contributions	100.00%	100.00%
Total expense associated with the retirement benefit plan	300,000	300,000
Current and former employees covered by "the Defined Benefit Plan"	300
Contribution made by company	200,000	100,000
Non-Vested Restricted Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized stock-based compensation expense	2,700,000
Weighted-average period, unrecognized expense expected to be recognized	5 years
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	1,000,000	1,000,000
Common stock issued as stock awards	350,000	350,000
Stock-based compensation expense	$ 100,000	$ 100,000
Percentage of employee contribution	15.00%	15.00%
Minimum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Percentage of employee contribution	1.00%	1.00%