Stock-Based Compensation (Schedule of Restricted Stock Award Activity) (Details) (Restricted Stock, USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of year, Shares	11,375
Granted, Shares	4,224
Vested, Shares	(4,500)
Forfeited or Cancelled, Shares	0
Outstanding at June 30, 2013, Shares	11,099	11,375
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value [Roll Forward]
Outstanding at beginning of year, Price	$ 24.24
Granted, Price	$ 42.70
Vested, Price	$ 21.99
Forfeited or Cancelled, Price	$ 0.00
Outstanding at June 30, 2013, Price	$ 32.17	$ 24.24
Outstanding at June 30, 2013, Weighted-average remaining contractual term	2 years 6 months 26 days	2 years 7 months 24 days