Share-Based Compensation Arrangements (Nonvested Share Units) (Details) (2013 Stock Option and Incentive Plan [Member], Time Based Nonvested Shares [Member], USD $)	6 Months Ended
	Jun. 30, 2013
2013 Stock Option and Incentive Plan [Member] | Time Based Nonvested Shares [Member]
Schedule of Nonvested Share Units Granted [Line Items]
Equity Instruments Other than Options Granted	12,000
Grant Date Fair Value	$ 26.79
Award Vesting Period	3 years