Stock Based Compensation (Awards of Restricted Stock) (Details) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted		20,700
Grant Date Fair Value		$ 39.82
3/20/2014 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted		65,950
Grant Date Fair Value		$ 39.82
Vesting Period	Ratably over 5 years from grant date
3/31/2014 | 2005 Employee Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted		3,000
Grant Date Fair Value		$ 39.00
Vesting Period	Ratably over 3 years from grant date
5/20/2014 | 2010 Non-Employee Director Stock Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Granted		10,920
Grant Date Fair Value		$ 35.08
Vesting Period	At the end of 5 years from grant date