Stock-Based Compensation (Schedule of Restricted Stock Awards) (Details) (Restricted Stock [Member], USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Grant Date - 2/1/2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date	February 1, 2012
Shares	66,000
Grant Date Fair Value	$ 30.15
Aggregate Fair Value	$ 1,990
Grant Date - 3/6/2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date	March 6, 2012
Shares	18,347
Grant Date Fair Value	$ 27.49
Aggregate Fair Value	504
Grant Date - 5/23/2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date	May 23, 2012
Shares	8,000
Grant Date Fair Value	$ 28.05
Aggregate Fair Value	224
Grant Date - 2/27/13 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date	February 27, 2013
Shares	12,973
Grant Date Fair Value	$ 42.49
Aggregate Fair Value	$ 551