Summary of Significant Accounting Policies (Stock-Based Compensation) (Narrative) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Number of shares authorized for issuance (in shares)	1,500,000
Shares of common stock available for grant (in shares)	2,600,000
Vested shares (in shares)	147,575	109,787
Outstanding options (in shares)	1,171,483
Intrinsic value of outstanding shares	$ 1,511,024
Exercisable (vested) options	394,886
Intrinsic value of exercisable shares	183,030
Forfeitures and expirations, weighted average grant date fair value	$ 6,698
Forfeited shares (in shares)	58,906
Minimum [Member]
Vesting period	1 year
Vesting period used in stock option valuation	1 year
Minimum percentage of outstanding shares as an annual adjustment (in hundredths)	10.00%
Treasury bond term on which risk free interest rate is based	5 years
Maximum [Member]
Vesting period	4 years
Vesting period used in stock option valuation	4 years
Maximum Term [Member]
Vesting period	10 years
Vesting period used in stock option valuation	10 years
Treasury bond term on which risk free interest rate is based	7 years