Stock-Based Compensation (Summary of Stock Option Activity) (Details) - Jun. 30, 2015 - USD ($) $ / shares in Units, $ in Millions	Total
Number of Shares [Roll Forward]
Outstanding - beginning of year, number of shares	143,500
Granted, number of shares	0
Exercised, number of shares	(60,000)
Canceled or expired, number of shares	0
Outstanding - end of year, number of shares	83,500
Options exercisable, number of shares	83,500
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)	14.90
Canceled or Expired, Weighted Average Exercise Price (in dollars per share)	0.00
Outstanding - end of year, Weighted Average Exercise Price (in dollars per share)	18.10
Options Exercisable - end of year, Weighted Average Exercise Price (in dollars per share)	$ 18.10
Outstanding - end of year, Weighted Average Remaining Contractual Term	2 years 1 month 6 days
Options exercisable, Weighted Average Remaining Contractual Term	2 years 1 month 6 days
Outstanding - end of year, Aggregate Intrinsic Value	$ 2.5
Options exercisable, Aggregate Intrinsic Value	$ 2.5