Share-Based Payments - Table 1 (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Weighted Average Assumptions Used to Determine Fair Value of Stock Options
Expected volatility	41.80%	42.80%	41.50%
Risk-free interest rate	1.40%	1.40%	2.80%
Expected life (years)	7 years 2 months	7 years	6 years 8 months
Dividend yield	0.00%	0.00%	0.00%