Stock-Based Compensation (Key Assumptions Used in Estimating Grant Date Fair Value of Stock Option Awards) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Awarded During 2014 [Member]
Key assumptions used in estimating the grant date fair values of stock option awards granted
Number of options for which fair value assumptions used	250,000
Risk-free interest rate (as a percent)	2.08%
Expected life of options	6 years 6 months
Expected volatility of underlying stock (as a percent)	50.97%
Awarded During 2013-1 [Member]
Key assumptions used in estimating the grant date fair values of stock option awards granted
Number of options for which fair value assumptions used	75,000	50,000
Risk-free interest rate (as a percent)	1.72%	1.64%
Expected life of options	5 years 3 months 18 days	5 years 8 months 12 days
Expected volatility of underlying stock (as a percent)	51.72%	51.81%
Awarded During 2013-2 [Member]
Key assumptions used in estimating the grant date fair values of stock option awards granted
Number of options for which fair value assumptions used	9,000
Risk-free interest rate (as a percent)	2.25%
Expected life of options	7 years
Expected volatility of underlying stock (as a percent)	50.68%
Awarded During 2012-1 [Member]
Key assumptions used in estimating the grant date fair values of stock option awards granted
Number of options for which fair value assumptions used	150,000		15,000
Risk-free interest rate (as a percent)	1.46%		1.12%
Expected life of options	4 years 7 months 6 days		7 years 3 months 18 days
Expected volatility of underlying stock (as a percent)	47.69%		50.59%
Awarded During 2012-2 [Member]
Key assumptions used in estimating the grant date fair values of stock option awards granted
Number of options for which fair value assumptions used	230,000
Risk-free interest rate (as a percent)	1.82%
Expected life of options	5 years 7 months 6 days
Expected volatility of underlying stock (as a percent)	51.86%
Awarded During 2009 [Member]
Key assumptions used in estimating the grant date fair values of stock option awards granted
Number of options for which fair value assumptions used		150,000	150,000
Risk-free interest rate (as a percent)		0.48%	0.88%
Expected life of options		3 years 7 months 6 days	4 years 4 months 24 days
Expected volatility of underlying stock (as a percent)		51.00%	53.89%