Stock-Based Compensation (Summary of Stock Option Activity) (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Number of Shares [Roll Forward]
Outstanding - beginning of year, number of shares | shares	143,500
Granted, number of shares | shares	0
Exercised, number of shares | shares	(75,000)
Canceled or expired, number of shares | shares	0
Outstanding - end of period, number of shares | shares	68,500
Options exercisable, number of shares | shares	68,500
Weighted Average Exercise Price [Abstract]
Outstanding - beginning of year, Weighted Average Exercise Price (in dollars per share)	$ 16.76
Granted, Weighted Average Exercise Price (in dollars per share)	0.00
Exercised, Weighted Average Exercise Price (in dollars per share)	14.94
Canceled or Expired, Weighted Average Exercise Price (in dollars per share)	0.00
Outstanding - end of period, Weighted Average Exercise Price (in dollars per share)	18.75
Options exercisable, Weighted Average Exercise Price (in dollars per share)	$ 18.75
Outstanding - end of period, Weighted Average Remaining Contractual Term	1 year 10 months 24 days
Options exercisable, Weighted Average Remaining Contractual Term	1 year 10 months 24 days
Outstanding - end of period, Aggregate Intrinsic Value | $	$ 0.9
Options exercisable, Aggregate Intrinsic Value | $	$ 0.9