Shareholder's Equity (Schedule of Stock Option Activity-Additional) (Details) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Equity [Abstract]
Total intrinsic value with options exercised	$ 4.2
Aggregate intrinsic value of options outstanding	2.4
Total intrinsic value of options vested or expected to vest	$ 0.0
Vested or expected to vest at end of period, Number of Shares | shares	44,209
Vested or expected to vest at end of period, weighted average exercise price | $ / shares	$ 22.70
Vested or expected to vest at end of period, Weighted Average Remaining Contractual Life (in years)	328 days
Total Intrinsic value of options exercisable	$ 0.0
Exercisable at end of period, Number of Shares | shares	44,209
Exercisable at end of period, Weighted Average Exercise Price | $ / shares	$ 22.70
Exercisable at end of period, Weighted Average Remaining Contractual Life (in years)	328 days