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Stock-Based Compensation (Summary of Stock Option Activity) (Details) (Employee Stock Option [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2011
Employee Stock Option [Member]
Options
Balance, beginning of year	450,000
Granted
Exercised	(400,000)	(450,000)
Forfeited
Balance, end of year	50,000
Exercisable at December 31	50,000		450,000
Vested at December 31, 2012	50,000
Weighted Average Exercise Price
Balance, beginning of year	$ 2.43
Granted
Exercised	$ 2.24	$ 1.93
Forfeited
Balance, end of year	$ 4.0
Exercisable at December 31	$ 4.0
Vested at December 31, 2012	$ 4.0
Intrinsic Value
Balance, end of year
Exercisable at December 31
Vested at December 31, 2012

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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