Share-Based Compensation - Summary of Assumptions (Details) (2007 Long-Term Incentive Plan)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Director and Officers [Member]
Expected dividend yield	1.19%	1.22%
Expected volatility	47.08%	47.54%
Risk-free interest rate	1.55%	1.19%
Expected life (in years)	7 years	7 years
Employees
Expected dividend yield	1.14%	1.22%	1.19%
Expected volatility	45.92%	45.99%	45.22%
Risk-free interest rate	1.40%	1.19%	1.41%
Expected life (in years)	8 years	8 years	8 years