Stock-Based Compensation (Summary of Stock Option Activity) (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($) $ / shares shares
Number of Shares [Roll Forward]
Outstanding - beginning of year, number of shares (in shares) | shares	60,000
Granted, number of shares (in shares) | shares	0
Exercised, number of shares (in shares) | shares	(2,000)
Canceled or expired, number of shares (in shares) | shares	0
Outstanding - end of year, number of shares (in shares) | shares	58,000
Options exercisable, number of shares (in shares) | shares	58,000
Weighted Average Exercise Price [Abstract]
Outstanding - beginning of year, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 19.41
Granted, Weighted Average Exercise Price (in dollars per share) | $ / shares	0.00
Exercised, Weighted Average Exercise Price (in dollars per share) | $ / shares	15.61
Canceled or Expired, Weighted Average Exercise Price (in dollars per share) | $ / shares	0.00
Outstanding - end of year, Weighted Average Exercise Price (in dollars per share) | $ / shares	19.54
Options Exercisable - end of year, Weighted Average Exercise Price (in dollars per share) | $ / shares	$ 19.54
Outstanding - end of year, weighted average remaining contractual term	1 year 1 month 6 days
Options Exercisable, Weighted Average remaining contractual term	1 year 1 month 6 days
Outstanding - end of year, Aggregate intrinsic value | $	$ 1.0
Options Exercisable, Aggregate intrinsic value | $	$ 1.0