Stock-based Compensation (Schedule of Share-based Goods and Nonemployee Services Transaction) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Stock [Member]
Share-based Goods and Nonemployee Services Transaction [Line Items]
Shares available for future issuance through the plan	11,000,000
Expected volatility	27.00%	49.00%	38.00%
Expected dividend yield	1.12%	1.16%	0.78%
Risk-free interest rate	0.06%	0.11%	0.14%
Weighted average grant-date fair value per share	$ 8.40	$ 8.93	$ 11.88
Restricted Stock | Non-Employee Director
Share-based Goods and Nonemployee Services Transaction [Line Items]
Number of units the plan allows for each non-employee director to receive an annual award	800
Number of months each offering period lasts beginning on January 1 and July 1 each year (in months)	6 months
Mandatory director retirement age	72 years
Years of service on the Board	4 years
Percentage of annual restriction lapse	25.00%
Number of shares reserved for non-employee issuance (in shares)	200,000
Number of shares issued to non-employee directors, inception to date (in shares)	39,200
Restricted Stock Units (RSUs) | Non-Employee Director
Share-based Goods and Nonemployee Services Transaction [Line Items]
Number of units the plan allows for each non-employee director to receive an annual award	800
Number of shares issued to non-employee directors during the period (in shares)	13,506
Number of shares of restricted stock issued to non-employee directors (in shares)	29,797
Minimum | Restricted Stock | Non-Employee Director
Share-based Goods and Nonemployee Services Transaction [Line Items]
Annual installment period	5 years
Maximum | Restricted Stock | Non-Employee Director
Share-based Goods and Nonemployee Services Transaction [Line Items]
Annual installment period	10 years