Equity (Assumptions) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair value options valuation assumptions [Abstract]
Expected life	6 years	6 years	6 years
Expected dividend yield (in hundredths)	0.00%	0.00%	0.00%
Risk-free interest rate, minimum (in hundredths)	0.85%	0.62%	0.86%
Risk-free interest rate, maximum (in hundredths)	1.88%	1.77%	2.24%
Maximum
Fair value options valuation assumptions [Abstract]
Expected volatility (in hundredths)	64.77%	64.30%	58.10%
Minimum
Fair value options valuation assumptions [Abstract]
Expected volatility (in hundredths)	61.41%	45.70%	57.30%