Shareholder's Equity (Schedule of Stock Option Activity-Additional) (Details) $ / shares in Units, $ in Millions	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Equity [Abstract]
Total intrinsic value with options exercised	$ 1.0
Aggregate intrinsic value of options outstanding	0.5
Total intrinsic value of options vested or expected to vest	$ 0.5
Vested or expected to vest at end of period, Number of Shares | shares	9,833
Vested or expected to vest at end of period, weighted average exercise price | $ / shares	$ 24.09
Vested or expected to vest at end of period, Weighted Average Remaining Contractual Life (in years)	180 days
Total Intrinsic value of options exercisable	$ 0.5
Exercisable at end of period, Number of Shares | shares	9,833
Exercisable at end of period, Weighted Average Exercise Price | $ / shares	$ 24.09
Exercisable at end of period, Weighted Average Remaining Contractual Life (in years)	180 days