Shareholders' Equity Shareholders' Equity (Details) (Serial Preferred Stock, 5.00 Percent Annual Dividend Rate [Member], Redeemable Preferred Stock [Member], USD $)	1 Months Ended
	May 31, 2013
Serial Preferred Stock, 5.00 Percent Annual Dividend Rate [Member] | Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Par or Stated Value Per Share	$ 100
Preferred Stock, Dividend Rate, Percentage	5.00%
Preferred Stock, Redemption Price Per Share	$ 100